Tommy John give up the most H/9 by a 45-year-old pitcher in a season, with 11.28 per nine innings in 1988.
Interpreted as:
best H/9 with a minimum of 1 IP per team game by a pitcher in a season at age 45| NAME | H/9 | AGE | SEASON | TM | G | W | L | W% | GS | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | GF | IBB | TBF | WP | K/9 | BB/9 | K/BB | HR/9 | K% | BB% | WHIP | BABIP | RA | ERA- | FIP | FIP- | PRAA | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | T. John | 11.28 | 45 | 1988 |  NYY | 35 | 9 | 8 | .529 | 32 | 4.49 | 81 | 0 | 0 | 0 | 176.1 | 221 | 88 | 96 | 11 | 46 | 6 | 2 | 4 | 776 | 5 | 4.13 | 2.35 | 1.76 | 0.56 | 10.4 | 5.9 | 1.51 | .332 | 4.90 | 113 | 3.54 | 90 | 7.4 |
| 2 | | J. Quinn | 10.18 | 45 | 1928 |  PHA | 31 | 18 | 7 | .720 | 28 | 2.90 | 43 | 18 | 4 | 1 | 211.1 | 239 | 68 | 92 | 3 | 34 | 7 | 2 | 898 | 0 | 1.83 | 1.45 | 1.26 | 0.13 | 4.8 | 3.8 | 1.29 | .291 | 3.92 | 71 | 3.27 | 83 | 16.1 | |
| 3 | | P. Niekro | 9.14 | 45 | 1984 | NYY | 32 | 16 | 8 | .667 | 31 | 3.09 | 136 | 5 | 1 | 0 | 215.2 | 219 | 74 | 85 | 15 | 76 | 3 | 1 | 0 | 916 | 2 | 5.68 | 3.17 | 1.79 | 0.63 | 14.8 | 8.3 | 1.37 | .297 | 3.55 | 80 | 3.50 | 89 | 10.3 |
| 4 | | J. Moyer | 9.12 | 45 | 2008 |  PHI | 33 | 16 | 7 | .696 | 33 | 3.71 | 123 | 0 | 0 | 0 | 196.1 | 199 | 81 | 85 | 20 | 62 | 11 | 0 | 4 | 841 | 3 | 5.64 | 2.84 | 1.98 | 0.92 | 14.6 | 7.4 | 1.33 | .286 | 3.90 | 86 | 4.31 | 99 | 1.1 |
| 5 | | C. Hough | 8.90 | 45 | 1993 |  FLA | 34 | 9 | 16 | .360 | 34 | 4.27 | 126 | 0 | 0 | 0 | 204.1 | 202 | 97 | 109 | 20 | 71 | 8 | 0 | 2 | 876 | 11 | 5.55 | 3.13 | 1.77 | 0.88 | 14.4 | 8.1 | 1.34 | .280 | 4.80 | 107 | 4.18 | 103 | -2.9 |
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