highest single season hr by a pitcher
| NAME | 1B | HR | SEASON | TM | G | SO | H | BB | HBP | IBB | K/BB | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | B. Blyleven | 50 | 1986 |  MIN | 36 | 215 | 262 | 58 | 10 | 4 | 3.71 | |
| 2 |  | J. Lima | 48 | 2000 |  HOU | 33 | 124 | 251 | 68 | 2 | 3 | 1.82 | |
| 3 |  | B. Arroyo | 46 | 2011 |  CIN | 32 | 108 | 227 | 45 | 6 | 5 | 2.40 | |
| 4 | | B. Blyleven | 46 | 1987 |  MIN | 37 | 196 | 249 | 101 | 9 | 4 | 1.94 | |
| 5 |  | L. Lynn | 44 | 2023 | TOT | 32 | 190 | 189 | 67 | 9 | 1 | 2.84 | |
| 6 |  | J. Moyer | 44 | 2004 |  SEA | 34 | 125 | 217 | 63 | 11 | 3 | 1.98 | |
| 7 |  | E. Milton | 43 | 2004 |  PHI | 34 | 161 | 196 | 75 | 1 | 6 | 2.15 | |
| 8 | | L. Giolito | 41 | 2023 | TOT | 33 | 203 | 169 | 73 | 9 | 4 | 2.78 | |
| 9 | | M. Leake | 41 | 2019 | TOT | 32 | 127 | 227 | 27 | 10 | 2 | 4.70 | |
| 10 |  | D. Bundy | 41 | 2018 |  BAL | 31 | 184 | 188 | 54 | 6 | 1 | 3.41 | |
| 11 |  | R. Helling | 41 | 1999 |  TEX | 35 | 131 | 228 | 85 | 6 | 5 | 1.54 | |
| 12 |  | P. Niekro | 41 | 1979 |  ATL | 44 | 208 | 311 | 113 | 11 | 8 | 1.84 | |
| 13 | | J. Shields | 40 | 2016 | TOT | 33 | 135 | 208 | 82 | 8 | 3 | 1.65 | |
| 14 | | E. Milton | 40 | 2005 | CIN | 34 | 123 | 237 | 52 | 7 | 2 | 2.37 | |
| 15 |  | R. Ortiz | 40 | 2002 |  ANA | 32 | 162 | 188 | 68 | 5 | 0 | 2.38 | |
| 16 | | S. Boskie | 40 | 1996 |  CAL | 37 | 133 | 226 | 67 | 13 | 7 | 1.99 | |
| 17 | | B. Radke | 40 | 1996 | MIN | 35 | 148 | 231 | 57 | 4 | 2 | 2.60 | |
| 18 | | B. Gullickson | 40 | 1987 | TOT | 35 | 117 | 218 | 50 | 3 | 7 | 2.34 | |
| 19 |  | J. Morris | 40 | 1986 |  DET | 35 | 223 | 229 | 82 | 0 | 7 | 2.72 | |
| 20 | | F. Jenkins | 40 | 1979 |  TEX | 37 | 164 | 252 | 81 | 3 | 6 | 2.02 | |
| 21 |  | J. Lyles | 39 | 2023 |  KCR | 31 | 120 | 176 | 45 | 6 | 0 | 2.67 | |
| 22 |  | M. Boyd | 39 | 2019 | DET | 32 | 238 | 178 | 50 | 8 | 1 | 4.76 | |
| 23 |  | E. Santana | 39 | 2012 |  LAA | 30 | 133 | 165 | 61 | 9 | 2 | 2.18 | |
| 24 |  | B. Looper | 39 | 2009 |  MIL | 34 | 100 | 226 | 64 | 5 | 6 | 1.56 | |
| 25 |  | B. Anderson | 39 | 1998 |  ARI | 32 | 95 | 221 | 24 | 4 | 2 | 3.96 | |
StatMuse has event-level data for home runs allowed and singles allowed going back to the 1974 season.
Some of the information used here was obtained free of charge from Retrosheet.
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