Jose Guzman had a record of 66-62 with an ERA of 3.90 and 715 strikeouts in 159 appearances for the Rangers 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 |  | J. Guzman | 1985 |  TEX | 5 | 3 | 2 | .600 | 5 | 2.76 | 24 | 0 | 0 | 0 | 32.2 | 27 | 10 | 13 | 3 | 14 | 0 | 0 | 1 | 140 | 1 | 6.61 | 3.86 | 1.71 | 0.83 | 17.1 | 10.0 | 1.26 | .242 | 3.58 | 65 | 3.69 | 91 | 7.44 | 1.3 |
| 2 | | J. Guzman | 1986 |  TEX | 29 | 9 | 15 | .375 | 29 | 4.54 | 87 | 2 | 0 | 0 | 172.1 | 199 | 87 | 101 | 23 | 60 | 6 | 0 | 2 | 757 | 3 | 4.54 | 3.13 | 1.45 | 1.20 | 11.5 | 7.9 | 1.50 | .303 | 5.27 | 107 | 4.64 | 112 | 10.39 | -9.2 |
| 3 | | J. Guzman | 1987 | TEX | 37 | 14 | 14 | .500 | 30 | 4.67 | 143 | 6 | 0 | 0 | 208.1 | 196 | 108 | 115 | 30 | 82 | 3 | 1 | 0 | 880 | 6 | 6.18 | 3.54 | 1.74 | 1.30 | 16.3 | 9.3 | 1.33 | .267 | 4.97 | 103 | 4.58 | 102 | 8.47 | -1.7 |
| 4 | | J. Guzman | 1988 | TEX | 30 | 11 | 13 | .458 | 30 | 3.70 | 157 | 6 | 2 | 0 | 206.2 | 180 | 85 | 99 | 20 | 82 | 5 | 0 | 3 | 876 | 10 | 6.84 | 3.57 | 1.91 | 0.87 | 17.9 | 9.4 | 1.27 | .261 | 4.31 | 92 | 3.76 | 96 | 7.84 | 3.5 |
| 5 | | J. Guzman | 1991 | TEX | 25 | 13 | 7 | .650 | 25 | 3.08 | 125 | 5 | 1 | 0 | 169.2 | 152 | 58 | 67 | 10 | 84 | 4 | 0 | 1 | 730 | 8 | 6.63 | 4.46 | 1.49 | 0.53 | 17.1 | 11.5 | 1.39 | .280 | 3.55 | 76 | 3.70 | 92 | 8.06 | 5.7 |
| 6 | | J. Guzman | 1992 | TEX | 33 | 16 | 11 | .593 | 33 | 3.66 | 179 | 5 | 0 | 0 | 224.0 | 229 | 91 | 103 | 17 | 73 | 4 | 0 | 0 | 947 | 6 | 7.19 | 2.93 | 2.45 | 0.68 | 18.9 | 7.7 | 1.35 | .315 | 4.14 | 94 | 3.19 | 82 | 9.20 | 17.5 |
| Total | 159 | 66 | 62 | .516 | 152 | 3.90 | 715 | 24 | 3 | 0 | 1013.2 | 983 | 439 | 498 | 103 | 395 | 22 | 1 | 7 | 4,330 | 34 | 6.35 | 3.51 | 1.81 | 0.91 | 16.5 | 9.1 | 1.36 | .284 | 4.42 | 94 | 3.94 | 96 | 8.73 | 17 |
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