Roger Clemens had a record of 192-111 with an ERA of 3.06 and 2,590 strikeouts in 383 appearances for the Red Sox in his career.
| NAME | 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- | H/9 | PRAA | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | R. Clemens | 1984 | 21 | 9 | 4 | .692 | 20 | 4.32 | 126 | 5 | 1 | 0 | 133.1 | 146 | 64 | 67 | 13 | 29 | 2 | 0 | 3 | 575 | 4 | 8.51 | 1.96 | 4.34 | 0.88 | 21.9 | 5.0 | 1.31 | .328 | 4.52 | 104 | 2.84 | 72 | 9.86 | 16.4 | |
| 2 | | R. Clemens | 1985 | 15 | 7 | 5 | .583 | 15 | 3.29 | 74 | 3 | 1 | 0 | 98.1 | 83 | 36 | 38 | 5 | 37 | 3 | 0 | 0 | 407 | 1 | 6.77 | 3.39 | 2.00 | 0.46 | 18.2 | 9.1 | 1.22 | .271 | 3.48 | 78 | 3.06 | 76 | 7.60 | 10.5 | |
| 3 | | R. Clemens | 1986 | 33 | 24 | 4 | .857 | 33 | 2.48 | 238 | 10 | 1 | 0 | 254.0 | 179 | 70 | 77 | 21 | 67 | 4 | 0 | 0 | 997 | 11 | 8.43 | 2.37 | 3.55 | 0.74 | 23.9 | 6.7 | 0.97 | .237 | 2.73 | 58 | 2.80 | 69 | 6.34 | 36.3 | |
| 4 | | R. Clemens | 1987 | 36 | 20 | 9 | .690 | 36 | 2.97 | 256 | 18 | 7 | 0 | 281.2 | 248 | 93 | 100 | 19 | 83 | 9 | 0 | 4 | 1,157 | 4 | 8.18 | 2.65 | 3.08 | 0.61 | 22.1 | 7.2 | 1.18 | .290 | 3.20 | 65 | 2.90 | 66 | 7.92 | 46.6 | |
| 5 | | R. Clemens | 1988 | 35 | 18 | 12 | .600 | 35 | 2.93 | 291 | 14 | 8 | 0 | 264.0 | 217 | 86 | 93 | 17 | 62 | 6 | 0 | 4 | 1,063 | 4 | 9.92 | 2.11 | 4.69 | 0.58 | 27.4 | 5.8 | 1.06 | .291 | 3.17 | 72 | 2.17 | 56 | 7.40 | 50.5 | |
| 6 | | R. Clemens | 1989 | 35 | 17 | 11 | .607 | 35 | 3.13 | 230 | 8 | 3 | 0 | 253.1 | 215 | 88 | 101 | 20 | 93 | 8 | 0 | 5 | 1,044 | 7 | 8.17 | 3.30 | 2.47 | 0.71 | 22.0 | 8.9 | 1.22 | .281 | 3.59 | 77 | 3.16 | 83 | 7.64 | 17.9 | |
| 7 | | R. Clemens | 1990 | 31 | 21 | 6 | .778 | 31 | 1.93 | 209 | 7 | 4 | 0 | 228.1 | 193 | 49 | 59 | 7 | 54 | 7 | 0 | 3 | 920 | 8 | 8.24 | 2.13 | 3.87 | 0.28 | 22.7 | 5.9 | 1.08 | .289 | 2.33 | 47 | 2.17 | 55 | 7.61 | 44.8 | |
| 8 | | R. Clemens | 1991 | 35 | 18 | 10 | .643 | 35 | 2.62 | 241 | 13 | 4 | 0 | 271.1 | 219 | 79 | 93 | 15 | 65 | 5 | 0 | 12 | 1,077 | 6 | 7.99 | 2.16 | 3.71 | 0.50 | 22.4 | 6.0 | 1.05 | .272 | 3.08 | 61 | 2.57 | 63 | 7.26 | 44.5 | |
| 9 | | R. Clemens | 1992 | 32 | 18 | 11 | .621 | 32 | 2.41 | 208 | 11 | 5 | 0 | 246.2 | 203 | 66 | 80 | 11 | 62 | 9 | 0 | 5 | 989 | 3 | 7.59 | 2.26 | 3.35 | 0.40 | 21.0 | 6.3 | 1.07 | .275 | 2.92 | 58 | 2.53 | 64 | 7.41 | 39.2 | |
| 10 | | R. Clemens | 1993 | 29 | 11 | 14 | .440 | 29 | 4.46 | 160 | 2 | 1 | 0 | 191.2 | 175 | 95 | 99 | 17 | 67 | 11 | 0 | 4 | 808 | 3 | 7.51 | 3.15 | 2.39 | 0.80 | 19.8 | 8.3 | 1.26 | .286 | 4.65 | 99 | 3.68 | 85 | 8.22 | 13.4 | |
| 11 | | R. Clemens | 1994 | 24 | 9 | 7 | .563 | 24 | 2.85 | 168 | 3 | 1 | 0 | 170.2 | 124 | 54 | 62 | 15 | 71 | 4 | 0 | 1 | 692 | 4 | 8.86 | 3.74 | 2.37 | 0.79 | 24.3 | 10.3 | 1.14 | .251 | 3.27 | 57 | 3.61 | 77 | 6.54 | 20.4 | |
| 12 | | R. Clemens | 1995 | 23 | 10 | 5 | .667 | 23 | 4.18 | 132 | 0 | 0 | 0 | 140.0 | 141 | 65 | 70 | 15 | 60 | 14 | 0 | 0 | 623 | 9 | 8.49 | 3.86 | 2.20 | 0.96 | 21.2 | 9.6 | 1.44 | .313 | 4.50 | 86 | 4.19 | 90 | 9.06 | 6.8 | |
| 13 | | R. Clemens | 1996 | 34 | 10 | 13 | .435 | 34 | 3.63 | 257 | 6 | 2 | 0 | 242.2 | 216 | 98 | 106 | 19 | 106 | 4 | 0 | 2 | 1,032 | 8 | 9.53 | 3.93 | 2.42 | 0.70 | 24.9 | 10.3 | 1.33 | .305 | 3.93 | 71 | 3.42 | 70 | 8.01 | 39.1 | |
| Total | 383 | 192 | 111 | .634 | 382 | 3.06 | 2,590 | 100 | 38 | 0 | 2776.0 | 2,359 | 943 | 1,045 | 194 | 856 | 86 | 0 | 43 | 11,384 | 72 | 8.40 | 2.78 | 3.03 | 0.63 | 22.8 | 7.5 | 1.16 | .283 | 3.39 | 70 | 2.93 | 70 | 7.65 | 386.6 |
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 Braves - y | 94 | 68 | .580 | |
 Phillies - w | 88 | 74 | .543 | 6.0 |
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| NL Central | W | L | PCT | GB |
 Brewers - y | 103 | 59 | .636 | |
 Cubs - w | 89 | 73 | .549 | 14.0 |
82 | 80 | .506 | 21.0 | |
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| NL West | W | L | PCT | GB |
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|---|---|---|---|---|
 Rays - y | 98 | 64 | .605 | |
 Yankees - w | 93 | 68 | .578 | 4.5 |
 Red Sox - w | 87 | 75 | .537 | 11.0 |
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 White Sox - w | 84 | 78 | .519 | 1.0 |
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 Astros - y | 81 | 81 | .500 | |
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