For years now, I have been tracking Clayton Kershaw’s year-by-year progressive career earned run average – meaning his career ERA at the end of a given season or after his most recent start during a current season.
Often times, I receive rather outlandish requests on twitter – requests that I would need a hefty paycheck to undertake, but in the case of this one, I decided to make an exception, because my own curiosity had piqued, and because I consider Bryn Swartz to be a friend.
Below you will find a chart containing Clayton Kershaw’s progressive career earned run average, to thousandths place, on a game-by-game basis.
| Game No. | Date | IP | ER | ERA | ERA +/- |
| 1 | May 25, 2008 | 6 | 2 | 3.000 | First Start |
| 2 | May 30, 2008 | 3.2 | 4 | 5.586 | Increased |
| 3 | June 4, 2008 | 5 | 2 | 4.909 | Decreased |
| 4 | June 10, 2008 | 5.1 | 2 | 4.500 | Decreased |
| 5 | June 15, 2008 | 4 | 0 | 3.750 | Decreased |
| 6 | June 20, 2008 | 5 | 4 | 4.345 | Increased |
| 7 | June 26, 2008 | 4 | 2 | 4.364 | Increased |
| 8 | July 1, 2008 | 5.2 | 3 | 4.422 | Increased |
| 9 | July 22, 2008 | 3 | 5 | 5.184 | Increased |
| 10 | July 27, 2008 | 6 | 0 | 4.531 | Decreased |
| 11 | Aug. 1, 2008 | 6 | 0 | 4.025 | Decreased |
| 12 | Aug. 7, 2008 | 7 | 1 | 3.709 | Decreased |
| 13 | Aug. 12, 2008 | 6 | 3 | 3.780 | Increased |
| 14 | Aug. 17, 2008 | 6 | 1 | 3.592 | Decreased |
| 15 | Aug. 23, 2008 | 4 | 6 | 4.109 | Increased |
| 16 | Aug. 28, 2008 | 2.1 | 5 | 4.557 | Increased |
| 17 | Sept. 2, 2008 | 7 | 3 | 4.500 | Decreased |
| 18 | Sept. 7, 2008 | 4 | 3 | 4.600 | Increased |
| 19 | Sept. 13, 2008 | 6 | 1 | 4.406 | Decreased |
| 20 | Sept. 18, 2008 | 5 | 1 | 4.277 | Decreased |
| 21 | Sept. 24, 2008 | 5.2 | 3 | 4.303 | Increased |
| 22 | Sept. 28, 2008 | 1 | 0 | 4.263 | Decreased |
| 23 | April 9, 2009 | 5 | 1 | 4.154 | Decreased |
| 24 | April 15, 2009 | 7 | 1 | 3.986 | Decreased |
| 25 | April 21, 2009 | 4.1 | 6 | 4.282 | Increased |
| 26 | April 26, 2009 | 4.2 | 9 | 4.756 | Increased |
| 27 | May 1, 2009 | 7 | 0 | 4.511 | Decreased |
| 28 | May 6, 2009 | 5 | 1 | 4.415 | Decreased |
| 29 | May 12, 2009 | 5 | 4 | 4.510 | Increased |
| 30 | May 17, 2009 | 7 | 1 | 4.362 | Decreased |
| 31 | May 22, 2009 | 5 | 1 | 4.281 | Decreased |
| 32 | May 27, 2009 | 6 | 3 | 4.289 | Increased |
| 33 | June 4, 2009 | 5.1 | 2 | 4.260 | Decreased |
| 34 | June 10, 2009 | 2.2 | 3 | 4.351 | Increased |
| 35 | June 16, 2009 | 5.2 | 0 | 4.212 | Decreased |
| 36 | June 21, 2009 | 7 | 0 | 4.052 | Decreased |
| 37 | June 26, 2009 | 6 | 2 | 4.019 | Decreased |
| 38 | July 1, 2009 | 5 | 0 | 3.916 | Decreased |
| 39 | July 7, 2009 | 6 | 0 | 3.800 | Decreased |
| 40 | July 12, 2009 | 6 | 1 | 3.733 | Decreased |
| 41 | July 18, 2009 | 7 | 0 | 3.611 | Decreased |
| 42 | July 24, 2009 | 6 | 2 | 3.595 | Decreased |
| 43 | July 29, 2009 | 8 | 0 | 3.469 | Decreased |
| 44 | Aug. 3, 2009 | 4 | 3 | 3.525 | Increased |
| 45 | Aug. 8, 2009 | 7 | 0 | 3.422 | Decreased |
| 46 | Aug. 14, 2009 | 4.1 | 4 | 3.509 | Increased |
| 47 | Aug. 19, 2009 | 3.2 | 2 | 3.530 | Increased |
| 48 | Aug. 25, 2009 | 6.1 | 2 | 3.512 | Decreased |
| 49 | Aug. 30, 2009 | 7 | 2 | 3.487 | Decreased |
| 50 | Sept. 4, 2009 | 6 | 1 | 3.443 | Decreased |
| 51 | Sept. 22, 2009 | 2 | 0 | 3.417 | Decreased |
| 52 | Sept. 27, 2009 | 4 | 2 | 3.433 | Increased |
| 53 | October 3, 2009 | 6 | 0 | 3.359 | Decreased |
| 54 | April 7, 2010 | 4.2 | 3 | 3.399 | Increased |
| 55 | April 13, 2010 | 5.1 | 2 | 3.398 | Decreased |
| 56 | April 18, 2010 | 7 | 1 | 3.348 | Decreased |
| 57 | April 24, 2010 | 6 | 2 | 3.341 | Decreased |
| 58 | April 29, 2010 | 6.1 | 2 | 3.331 | Decreased |
| 59 | May 4, 2010 | 1.1 | 7 | 3.520 | Increased |
| 60 | May 9, 2010 | 8 | 0 | 3.432 | Decreased |
| 61 | May 15, 2010 | 7 | 1 | 3.385 | Decreased |
| 62 | May 20, 2010 | 7.1 | 1 | 3.338 | Decreased |
| 63 | May 25, 2010 | 6 | 0 | 3.278 | Decreased |
| 64 | May 30, 2010 | 5 | 2 | 3.283 | Increased |
| 65 | June 4, 2010 | 6.2 | 3 | 3.298 | Increased |
| 66 | June 9, 2010 | 7 | 3 | 3.309 | Increased |
| 67 | June 16, 2010 | 7.1 | 1 | 3.267 | Decreased |
| 68 | June 22, 2010 | 6.2 | 5 | 3.329 | Increased |
| 69 | June 27, 2010 | 7 | 2 | 3.315 | Decreased |
| 70 | July 3, 2010 | 5.2 | 0 | 3.266 | Decreased |
| 71 | July 8, 2010 | 8 | 2 | 3.246 | Decreased |
| 72 | July 15, 2010 | 4.1 | 4 | 3.301 | Increased |
| 73 | July 20, 2010 | 6 | 2 | 3.297 | Decreased |
| 74 | July 25, 2010 | 8 | 0 | 3.232 | Decreased |
| 75 | Aug. 1, 2010 | 7 | 2 | 3.221 | Decreased |
| 76 | Aug. 6, 2010 | 6 | 6 | 3.303 | Increased |
| 77 | Aug. 12, 2010 | 6.2 | 2 | 3.294 | Decreased |
| 78 | Aug. 17, 2010 | 7 | 0 | 3.241 | Decreased |
| 79 | Aug. 22, 2010 | 7 | 3 | 3.251 | Increased |
| 80 | Aug. 27, 2010 | 6 | 1 | 3.227 | Decreased |
| 81 | Sept. 1, 2010 | 6 | 2 | 3.224 | Decreased |
| 82 | Sept. 7, 2010 | 7 | 2 | 3.214 | Decreased |
| 83 | Sept. 14, 2010 | 9 | 0 | 3.153 | Decreased |
| 84 | Sept. 19, 2010 | 4 | 4 | 3.202 | Increased |
| 85 | Sept. 24, 2010 | 8 | 1 | 3.168 | Decreased |
| 86 | March 31, 2011 | 7 | 0 | 3.122 | Decreased |
| 87 | April 5, 2011 | 6 | 3 | 3.139 | Increased |
| 88 | April 11, 2011 | 6.2 | 0 | 3.097 | Decreased |
| 89 | April 16, 2011 | 4.2 | 5 | 3.158 | Increased |
| 90 | April 21, 2011 | 8.2 | 3 | 3.157 | Decreased |
| 91 | April 26, 2011 | 5.1 | 4 | 3.194 | Increased |
| 92 | May 2, 2011 | 7 | 2 | 3.185 | Decreased |
| 93 | May 8, 2011 | 6.2 | 1 | 3.163 | Decreased |
| 94 | May 13, 2011 | 7 | 0 | 3.122 | Decreased |
| 95 | May 18, 2011 | 5 | 4 | 3.159 | Increased |
| 96 | May 23, 2011 | 6 | 1 | 3.141 | Decreased |
| 97 | May 29, 2011 | 9 | 0 | 3.091 | Decreased |
| 98 | June 4, 2011 | 6.2 | 6 | 3.149 | Increased |
| 99 | June 9, 2011 | 6 | 6 | 3.211 | Increased |
| 100 | June 14, 2011 | 7 | 1 | 3.187 | Decreased |
| 101 | June 20, 2011 | 9 | 0 | 3.139 | Decreased |
| 102 | June 26, 2011 | 9 | 2 | 3.122 | Decreased |
| 103 | July 2, 2011 | 6 | 6 | 3.180 | Increased |
| 104 | July 7, 2011 | 8 | 0 | 3.139 | Decreased |
| 105 | July 15, 2011 | 7 | 0 | 3.103 | Decreased |
| 106 | July 20, 2011 | 8 | 0 | 3.064 | Decreased |
| 107 | July 26, 2011 | 6.2 | 2 | 3.060 | Decreased |
| 108 | Aug. 1, 2011 | 9 | 2 | 3.045 | Decreased |
| 109 | Aug. 7, 2011 | 6.1 | 4 | 3.071 | Increased |
| 110 | Aug. 13, 2011 | 8 | 1 | 3.047 | Decreased |
| 111 | Aug. 18, 2011 | 8 | 0 | 3.011 | Decreased |
| 112 | Aug. 23, 2011 | 6 | 0 | 2.984 | Decreased |
| 113 | Aug. 29, 2011 | 9 | 1 | 2.957 | Decreased |
| 114 | Sept. 4, 2011 | 7 | 2 | 2.954 | Decreased |
| 115 | Sept. 9, 2011 | 8 | 0 | 2.920 | Decreased |
| 116 | Sept. 14, 2011 | 5 | 0 | 2.899 | Decreased |
| 117 | Sept. 20, 2011 | 7.1 | 1 | 2.882 | Decreased |
| 118 | Sept. 25, 2011 | 7.1 | 2 | 2.877 | Decreased |
| 119 | April 5, 2012 | 3 | 0 | 2.865 | Decreased |
| 120 | April 10, 2012 | 7 | 1 | 2.850 | Decreased |
| 121 | April 15, 2012 | 5.1 | 3 | 2.866 | Increased |
| 122 | April 21, 2012 | 7 | 0 | 2.839 | Decreased |
| 123 | April 27, 2012 | 8 | 2 | 2.833 | Decreased |
| 124 | May 2, 2012 | 7.1 | 5 | 2.865 | Increased |
| 125 | May 8, 2012 | 8 | 2 | 2.858 | Decreased |
| 126 | May 14, 2012 | 7 | 0 | 2.832 | Decreased |
| 127 | May 19, 2012 | 9 | 0 | 2.799 | Decreased |
| 128 | May 25, 2012 | 7 | 2 | 2.797 | Decreased |
| 129 | May 30, 2012 | 5.2 | 5 | 2.834 | Increased |
| 130 | June 4, 2012 | 7 | 3 | 2.843 | Increased |
| 131 | June 9, 2012 | 7 | 3 | 2.852 | Increased |
| 132 | June 15, 2012 | 6 | 4 | 2.875 | Increased |
| 133 | June 21, 2012 | 8 | 1 | 2.858 | Decreased |
| 134 | June 26, 2012 | 6 | 2 | 2.859 | Increased |
| 135 | July 1, 2012 | 7 | 1 | 2.846 | Decreased |
| 136 | July 6, 2012 | 5.1 | 5 | 2.882 | Increased |
| 137 | July 13, 2012 | 6 | 1 | 2.872 | Decreased |
| 138 | July 18, 2012 | 8 | 1 | 2.855 | Decreased |
| 139 | July 24, 2012 | 5.2 | 8 | 2.921 | Increased |
| 140 | July 29, 2012 | 9 | 0 | 2.890 | Decreased |
| 141 | Aug. 4, 2012 | 7 | 1 | 2.877 | Decreased |
| 142 | Aug. 10, 2012 | 6.1 | 2 | 2.877 | Decreased |
| 143 | Aug. 15, 2012 | 8 | 3 | 2.882 | Increased |
| 144 | Aug. 20, 2012 | 8 | 2 | 2.876 | Decreased |
| 145 | Aug. 25, 2012 | 8 | 2 | 2.870 | Decreased |
| 146 | Aug. 30, 2012 | 6 | 2 | 2.871 | Increased |
| 147 | Sept. 4, 2012 | 7 | 1 | 2.859 | Decreased |
| 148 | Sept. 11, 2012 | 7 | 0 | 2.837 | Decreased |
| 149 | Sept. 23, 2012 | 5 | 1 | 2.832 | Decreased |
| 150 | Sept. 28, 2012 | 8 | 0 | 2.808 | Decreased |
| 151 | October 3, 2012 | 8 | 1 | 2.793 | Decreased |
| 152 | April 1, 2013 | 9 | 0 | 2.767 | Decreased |
| 153 | April 6, 2013 | 7 | 0 | 2.747 | Decreased |
| 154 | April 12, 2013 | 7.1 | 3 | 2.754 | Increased |
| 155 | April 17, 2013 | 5.1 | 3 | 2.767 | Increased |
| 156 | April 23, 2013 | 5 | 2 | 2.771 | Increased |
| 157 | April 28, 2013 | 8 | 0 | 2.748 | Decreased |
| 158 | May 3, 2013 | 7 | 1 | 2.738 | Decreased |
| 159 | May 8, 2013 | 7 | 1 | 2.728 | Decreased |
| 160 | May 14, 2013 | 8.2 | 0 | 2.704 | Decreased |
| 161 | May 20, 2013 | 9 | 1 | 2.689 | Decreased |
| 162 | May 26, 2013 | 7 | 4 | 2.706 | Increased |
| 163 | May 31, 2013 | 7 | 3 | 2.714 | Increased |
| 164 | June 5, 2013 | 6 | 2 | 2.716 | Increased |
| 165 | June 10, 2013 | 7 | 1 | 2.706 | Decreased |
| 166 | June 15, 2013 | 7 | 1 | 2.697 | Decreased |
| 167 | June 21, 2013 | 6 | 4 | 2.715 | Increased |
| 168 | June 26, 2013 | 8 | 2 | 2.712 | Decreased |
| 169 | July 2, 2013 | 9 | 0 | 2.689 | Decreased |
| 170 | July 7, 2013 | 8 | 1 | 2.678 | Decreased |
| 171 | July 12, 2013 | 7 | 3 | 2.685 | Increased |
| 172 | July 21, 2013 | 7 | 2 | 2.684 | Decreased |
| 173 | July 26, 2013 | 8 | 1 | 2.673 | Decreased |
| 174 | July 31, 2013 | 8 | 0 | 2.654 | Decreased |
| 175 | Aug. 6, 2013 | 6 | 2 | 2.656 | Increased |
| 176 | Aug. 11, 2013 | 8 | 1 | 2.645 | Decreased |
| 177 | Aug. 17, 2013 | 8 | 0 | 2.626 | Decreased |
| 178 | Aug. 22, 2013 | 8 | 0 | 2.608 | Decreased |
| 179 | Aug. 27, 2013 | 5.2 | 1 | 2.603 | Decreased |
| 180 | Sept. 2, 2013 | 5 | 5 | 2.631 | Increased |
| 181 | Sept. 8, 2013 | 7 | 2 | 2.630 | Decreased |
| 182 | Sept. 13, 2013 | 7 | 2 | 2.630 | Decreased |
| 183 | Sept. 21, 2013 | 7 | 0 | 2.614 | Decreased |
| 184 | Sept. 27, 2013 | 6 | 0 | 2.601 | Decreased |
| 185 | March 22, 2014 | 6.2 | 1 | 2.594 | Decreased |
| 186 | May 6, 2014 | 7 | 0 | 2.579 | Decreased |
| 187 | May 11, 2014 | 7 | 3 | 2.586 | Increased |
| 188 | May 17, 2014 | 1.2 | 7 | 2.635 | Increased |
| 189 | May 23, 2014 | 6 | 0 | 2.622 | Decreased |
| 190 | May 28, 2014 | 7 | 3 | 2.629 | Increased |
| 191 | June 2, 2014 | 8 | 2 | 2.626 | Decreased |
| 192 | June 8, 2014 | 5 | 1 | 2.623 | Decreased |
| 193 | June 13, 2014 | 7 | 1 | 2.615 | Decreased |
| 194 | June 18, 2014 | 9 | 0 | 2.597 | Decreased |
| 195 | June 24, 2014 | 8 | 0 | 2.580 | Decreased |
| 196 | June 29, 2014 | 7 | 0 | 2.566 | Decreased |
| 197 | July 4, 2014 | 8 | 0 | 2.549 | Decreased |
| 198 | July 10, 2014 | 9 | 1 | 2.539 | Decreased |
| 199 | July 20, 2014 | 7 | 3 | 2.546 | Increased |
| 200 | July 26, 2014 | 9 | 0 | 2.528 | Decreased |
| 201 | July 31, 2014 | 9 | 1 | 2.517 | Decreased |
| 202 | Aug. 5, 2014 | 7 | 3 | 2.525 | Increased |
| 203 | Aug. 10, 2014 | 8 | 1 | 2.516 | Decreased |
| 204 | Aug. 16, 2014 | 9 | 3 | 2.519 | Increased |
| 205 | Aug. 21, 2014 | 8 | 1 | 2.511 | Decreased |
| 206 | Aug. 27, 2014 | 8 | 0 | 2.496 | Decreased |
| 207 | Sept. 2, 2014 | 8 | 1 | 2.488 | Decreased |
| 208 | Sept. 8, 2014 | 8 | 1 | 2.480 | Decreased |
| 209 | Sept. 14, 2014 | 8 | 2 | 2.479 | Decreased |
| 210 | Sept. 19, 2014 | 5 | 3 | 2.489 | Increased |
| 211 | Sept. 24, 2014 | 8 | 1 | 2.481 | Decreased |
| 212 | April 6, 2015 | 6 | 3 | 2.490 | Increased |
| 213 | April 11, 2015 | 6.1 | 5 | 2.511 | Increased |
| 214 | April 17, 2015 | 6 | 1 | 2.507 | Decreased |
| 215 | April 22, 2015 | 6 | 2 | 2.509 | Increased |
| 216 | April 28, 2015 | 7 | 2 | 2.509 | Increased |
| 217 | May 4, 2015 | 7.1 | 3 | 2.515 | Increased |
| 218 | May 10, 2015 | 5.2 | 5 | 2.537 | Increased |
| 219 | May 15, 2015 | 6.2 | 3 | 2.544 | Increased |
| 220 | May 21, 2015 | 7.1 | 4 | 2.556 | Increased |
| 221 | May 26, 2015 | 7 | 0 | 2.544 | Decreased |
| 222 | June 1, 2015 | 7 | 2 | 2.544 | Increased |
| 223 | June 6, 2015 | 8 | 0 | 2.530 | Decreased |
| 224 | June 12, 2015 | 6.2 | 1 | 2.524 | Decreased |
| 225 | June 17, 2015 | 6 | 3 | 2.532 | Increased |
| 226 | June 22, 2015 | 7 | 3 | 2.539 | Increased |
| 227 | June 27, 2015 | 7 | 1 | 2.533 | Decreased |
| 228 | July 3, 2015 | 7 | 1 | 2.527 | Decreased |
| 229 | July 8, 2015 | 9 | 0 | 2.512 | Decreased |
| 230 | July 18, 2015 | 8 | 0 | 2.498 | Decreased |
| 231 | July 23, 2015 | 9 | 0 | 2.484 | Decreased |
| 232 | Aug. 1, 2015 | 8 | 0 | 2.471 | Decreased |
| 233 | Aug. 7, 2015 | 6 | 4 | 2.484 | Increased |
| 234 | Aug. 12, 2015 | 8 | 0 | 2.472 | Decreased |
| 235 | Aug. 18, 2015 | 7 | 1 | 2.466 | Decreased |
| 236 | Aug. 23, 2015 | 8 | 1 | 2.459 | Decreased |
| 237 | Aug. 28, 2015 | 8 | 1 | 2.452 | Decreased |
| 238 | Sept. 2, 2015 | 9 | 1 | 2.444 | Decreased |
| 239 | Sept. 8, 2015 | 7 | 1 | 2.439 | Decreased |
| 240 | Sept. 14, 2015 | 7 | 1 | 2.434 | Decreased |
| 241 | Sept. 19, 2015 | 7 | 3 | 2.440 | Increased |
| 242 | Sept. 24, 2015 | 5 | 3 | 2.449 | Increased |
| 243 | Sept. 29, 2015 | 9 | 0 | 2.436 | Decreased |
| 244 | October 4, 2015 | 3.2 | 0 | 2.430 | Decreased |
| 245 | April 4, 2016 | 7 | 0 | 2.420 | Decreased |
| 246 | April 9, 2016 | 8 | 2 | 2.419 | Decreased |
| 247 | April 15, 2016 | 7 | 2 | 2.419 | Increased |
| 248 | April 21, 2016 | 8 | 1 | 2.413 | Decreased |
| 249 | April 26, 2016 | 7 | 5 | 2.430 | Increased |
| 250 | May 1, 2016 | 9 | 0 | 2.417 | Decreased |
| 251 | May 7, 2016 | 7 | 2 | 2.418 | Increased |
| 252 | May 12, 2016 | 9 | 0 | 2.405 | Decreased |
| 253 | May 17, 2016 | 8 | 1 | 2.399 | Decreased |
| 254 | May 23, 2016 | 9 | 0 | 2.386 | Decreased |
| 255 | May 29, 2016 | 7.2 | 2 | 2.386 | Decreased |
| 256 | June 4, 2016 | 6 | 0 | 2.377 | Decreased |
| 257 | June 10, 2016 | 8 | 2 | 2.377 | Decreased |
| 258 | June 15, 2016 | 7.1 | 2 | 2.377 | Increased |
| 259 | June 20, 2016 | 7 | 1 | 2.373 | Decreased |
| 260 | June 26, 2016 | 6 | 4 | 2.385 | Increased |
| 261 | Sept. 9, 2016 | 3 | 2 | 2.391 | Increased |
| 262 | Sept. 14, 2016 | 5 | 0 | 2.384 | Decreased |
| 263 | Sept. 19, 2016 | 6 | 0 | 2.376 | Decreased |
| 264 | Sept. 24, 2016 | 7 | 0 | 2.367 | Decreased |
| 265 | October 1, 2016 | 7 | 2 | 2.368 | Increased |
| 266 | April 3, 2017 | 7 | 1 | 2.363 | Decreased |
| 267 | April 8, 2017 | 6 | 4 | 2.376 | Increased |
| 268 | April 14, 2017 | 8.1 | 1 | 2.370 | Decreased |
| 269 | April 19, 2017 | 7 | 2 | 2.370 | Increased |
| 270 | April 25, 2017 | 7 | 1 | 2.366 | Decreased |
| 271 | May 1, 2017 | 6 | 3 | 2.373 | Increased |
| 272 | May 6, 2017 | 7.1 | 1 | 2.369 | Decreased |
| 273 | May 12, 2017 | 7 | 2 | 2.369 | Increased |
| 274 | May 17, 2017 | 7 | 0 | 2.360 | Decreased |
| 275 | May 23, 2017 | 9 | 1 | 2.354 | Decreased |
| 276 | May 28, 2017 | 4.1 | 4 | 2.368 | Increased |
| 277 | June 2, 2017 | 7 | 1 | 2.364 | Decreased |
| 278 | June 7, 2017 | 7 | 1 | 2.359 | Decreased |
| 279 | June 13, 2017 | 7 | 2 | 2.360 | Increased |
| 280 | June 19, 2017 | 6.1 | 6 | 2.381 | Increased |
| 281 | June 24, 2017 | 6 | 0 | 2.374 | Decreased |
| 282 | June 29, 2017 | 7 | 0 | 2.365 | Decreased |
| 283 | July 4, 2017 | 7 | 0 | 2.356 | Decreased |
| 284 | July 9, 2017 | 9 | 2 | 2.354 | Decreased |
| 285 | July 18, 2017 | 7 | 0 | 2.346 | Decreased |
| 286 | July 23, 2017 | 2 | 0 | 2.343 | Decreased |
| 287 | Sept. 1, 2017 | 6 | 0 | 2.336 | Decreased |
| 288 | Sept. 7, 2017 | 3.2 | 4 | 2.350 | Increased |
| 289 | Sept. 12, 2017 | 6 | 1 | 2.347 | Decreased |
| 290 | Sept. 18, 2017 | 6 | 4 | 2.359 | Increased |
| 291 | Sept. 24, 2017 | 8 | 1 | 2.354 | Decreased |
| 292 | Sept. 30, 2017 | 4 | 3 | 2.363 | Increased |
| 293 | March 29, 2018 | 6 | 1 | 2.360 | Decreased |
| 294 | April 3, 2018 | 6 | 2 | 2.362 | Increased |
| 295 | April 8, 2018 | 7 | 1 | 2.358 | Decreased |
| 296 | April 15, 2018 | 7 | 1 | 2.354 | Decreased |
| 297 | April 20, 2018 | 7 | 4 | 2.364 | Increased |
| 298 | April 25, 2018 | 5 | 3 | 2.372 | Increased |
| 299 | May 1, 2018 | 6 | 2 | 2.374 | Increased |
| 300 | May 31, 2018 | 5 | 1 | 2.372 | Decreased |
| 301 | June 23, 2018 | 3 | 2 | 2.378 | Increased |
| 302 | June 28, 2018 | 5 | 1 | 2.377 | Decreased |
| 303 | July 3, 2018 | 6 | 2 | 2.378 | Increased |
| 304 | July 9, 2018 | 6 | 0 | 2.371 | Decreased |
| 305 | July 15, 2018 | 6.2 | 3 | 2.377 | Increased |
| 306 | July 21, 2018 | 6 | 1 | 2.374 | Decreased |
| 307 | July 27, 2018 | 7.2 | 1 | 2.370 | Decreased |
| 308 | Aug. 2, 2018 | 6 | 2 | 2.372 | Increased |
| 309 | Aug. 8, 2018 | 6 | 2 | 2.373 | Increased |
| 310 | Aug. 13, 2018 | 8 | 1 | 2.368 | Decreased |
| 311 | Aug. 19, 2018 | 7 | 1 | 2.365 | Decreased |
| 312 | Aug. 25, 2018 | 8 | 2 | 2.364 | Decreased |
| 313 | Sept. 1, 2018 | 7 | 2 | 2.365 | Increased |
| 314 | Sept. 7, 2018 | 6 | 2 | 2.367 | Increased |
| 315 | Sept. 13, 2018 | 6 | 3 | 2.373 | Increased |
| 316 | Sept. 18, 2018 | 7 | 1 | 2.369 | Decreased |
| 317 | Sept. 24, 2018 | 6 | 3 | 2.376 | Increased |
| 318 | Sept. 29, 2018 | 5 | 5 | 2.391 | Increased |
| 319 | April 15, 2019 | 7 | 2 | 2.392 | Increased |
| 320 | April 21, 2019 | 6 | 2 | 2.394 | Increased |
| 321 | April 27, 2019 | 7 | 1 | 2.390 | Decreased |
| 322 | May 3, 2019 | 6 | 3 | 2.396 | Increased |
| 323 | May 8, 2019 | 6.2 | 4 | 2.405 | Increased |
| 324 | May 14, 2019 | 7 | 3 | 2.410 | Increased |
| 325 | May 21, 2019 | 6.1 | 2 | 2.411 | Increased |
| 326 | May 27, 2019 | 6 | 3 | 2.417 | Increased |
| 327 | June 1, 2019 | 7 | 0 | 2.409 | Decreased |
| 328 | June 7, 2019 | 7 | 2 | 2.410 | Increased |
| 329 | June 13, 2019 | 6 | 3 | 2.416 | Increased |
| 330 | June 18, 2019 | 7 | 0 | 2.408 | Decreased |
| 331 | June 24, 2019 | 6 | 4 | 2.418 | Increased |
| 332 | June 29, 2019 | 7 | 4 | 2.427 | Increased |
| 333 | July 5, 2019 | 7 | 1 | 2.423 | Decreased |
| 334 | July 15, 2019 | 6 | 1 | 2.420 | Decreased |
| 335 | July 20, 2019 | 6 | 0 | 2.414 | Decreased |
| 336 | July 27, 2019 | 6 | 2 | 2.415 | Increased |
| 337 | Aug. 1, 2019 | 6 | 2 | 2.417 | Increased |
| 338 | Aug. 6, 2019 | 7 | 1 | 2.413 | Decreased |
| 339 | Aug. 14, 2019 | 7 | 0 | 2.406 | Decreased |
| 340 | Aug. 20, 2019 | 6 | 3 | 2.411 | Increased |
| 341 | Aug. 25, 2019 | 7 | 3 | 2.416 | Increased |
| 342 | Aug. 31, 2019 | 5 | 5 | 2.431 | Increased |
| 343 | Sept. 6, 2019 | 4 | 3 | 2.438 | Increased |
| 344 | Sept. 13, 2019 | 6.1 | 2 | 2.439 | Increased |
| 345 | Sept. 20, 2019 | 6 | 4 | 2.449 | Increased |
| 346 | Sept. 26, 2019 | 6 | 0 | 2.442 | Decreased |
| 347 | Sept. 29, 2019 | 1 | 0 | 2.441 | Decreased |
| 348 | Aug. 2, 2020 | 5.2 | 0 | 2.435 | Decreased |
| 349 | Aug. 8, 2020 | 4.1 | 4 | 2.446 | Increased |
| 350 | Aug. 14, 2020 | 7 | 1 | 2.443 | Decreased |
| 351 | Aug. 20, 2020 | 7 | 1 | 2.439 | Decreased |
| 352 | Aug. 27, 2020 | 6 | 0 | 2.433 | Decreased |
| 353 | Sept. 3, 2020 | 6 | 0 | 2.427 | Decreased |
| 354 | Sept. 9, 2020 | 5 | 3 | 2.433 | Increased |
| 355 | Sept. 14, 2020 | 6.1 | 3 | 2.438 | Increased |
| 356 | Sept. 19, 2020 | 7 | 1 | 2.435 | Decreased |
| 357 | Sept. 25, 2020 | 4 | 1 | 2.434 | Decreased |
Kershaw has pitched in 353 career games, three of which were relief appearances, his career earned run average increased after 132of them and decreased after 224 of them (with the remaining game being the first start of his career).
This was a fun and a relatively quick and easy project, but, with apologies to Bryn, someone is going to have to pay me if you want to see this inning-by-inning or pitch-by-pitch.
