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| Year | Age | Lvl | Lg | Org | W | L | Win% | SV | G | GS | GF | CG | ShO | IP | H | R | ER | HR | BB | IBB | SO | HB | GIDP | ERA | WHIP |  | 1976 | 20 | MLB | NL | HOU | 3 | 1 | .750 | 0 | 4 | 4 | 0 | 1 | 0 | 29.0 | 26 | 12 | 9 | 2 | 7 | 2 | 9 | 0 | 0 | 2.79 | 1.14 |  | 1977 | 21 | MLB | NL | HOU | 9 | 14 | .391 | 0 | 34 | 30 | 1 | 5 | 0 | 214.2 | 237 | 88 | 83 | 20 | 52 | 4 | 83 | 3 | 11 | 3.48 | 1.35 |  | 1978 | 22 | MLB | NL | HOU | 9 | 14 | .391 | 1 | 33 | 30 | 2 | 9 | 1 | 210.1 | 204 | 100 | 92 | 20 | 66 | 5 | 77 | 9 | 13 | 3.94 | 1.28 |  | 1979 | 23 | MLB | AL | TOR | 1 | 9 | .100 | 0 | 18 | 10 | 5 | 2 | 0 | 83.0 | 97 | 64 | 58 | 14 | 34 | 8 | 40 | 3 | 11 | 6.29 | 1.58 |  | Totals |  |  |  |  | W | L | Win% | SV | G | GS | GF | CG | ShO | IP | H | R | ER | HR | BB | IBB | SO | HB | GIDP | ERA | WHIP |  | Career | HOU | 21 | 29 | .420 | 1 | 71 | 64 | 3 | 15 | 1 | 454.0 | 467 | 200 | 184 | 42 | 125 | 11 | 169 | 12 | 24 | 3.65 | 1.30 |  | Career | TOR | 1 | 9 | .100 | 0 | 18 | 10 | 5 | 2 | 0 | 83.0 | 97 | 64 | 58 | 14 | 34 | 8 | 40 | 3 | 11 | 6.29 | 1.58 |  | Career | Majors | 22 | 38 | .367 | 1 | 89 | 74 | 8 | 17 | 1 | 537.0 | 564 | 264 | 242 | 56 | 159 | 19 | 209 | 15 | 35 | 4.06 | 1.35 |  |  |  | 
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| Year | Age | Lvl | Lg | Org | W | L | Win% | SV | G | GS | GF | CG | ShO | IP | H | R | ER | HR | BB | IBB | SO | HB | GIDP | ERA | WHIP |  | 1976 | 20 | MLB | NL | HOU |  |  |  |  |  |  |  |  |  | 10.2 | 13 | 4 | 2 | 0 | 2 | 1 | 3 | 0 | 0 | 1.69 | 1.41 |  | 1976 | 20 | MLB | NL | HOU |  |  |  |  |  |  |  |  |  | 18.1 | 13 | 8 | 7 | 2 | 5 | 1 | 6 | 0 | 0 | 3.44 | 0.98 |  | 1977 | 21 | MLB | NL | HOU |  |  |  |  |  |  |  |  |  | 97.0 | 102 | 39 | 36 | 7 | 30 | 2 | 29 | 2 | 6 | 3.34 | 1.36 |  | 1977 | 21 | MLB | NL | HOU |  |  |  |  |  |  |  |  |  | 117.2 | 135 | 49 | 47 | 13 | 22 | 2 | 54 | 1 | 5 | 3.59 | 1.33 |  | 1978 | 22 | MLB | NL | HOU |  |  |  |  |  |  |  |  |  | 100.2 | 89 | 45 | 41 | 7 | 38 | 4 | 27 | 0 | 5 | 3.67 | 1.26 |  | 1978 | 22 | MLB | NL | HOU |  |  |  |  |  |  |  |  |  | 109.2 | 115 | 55 | 51 | 13 | 28 | 1 | 50 | 9 | 8 | 4.19 | 1.30 |  | 1979 | 23 | MLB | AL | TOR |  |  |  |  |  |  |  |  |  | 38.1 | 44 | 28 | 24 | 5 | 23 | 6 | 11 | 1 | 5 | 5.63 | 1.75 |  | 1979 | 23 | MLB | AL | TOR |  |  |  |  |  |  |  |  |  | 44.2 | 53 | 36 | 34 | 9 | 11 | 2 | 29 | 2 | 6 | 6.85 | 1.43 |  | Totals |  |  |  |  | W | L | Win% | SV | G | GS | GF | CG | ShO | IP | H | R | ER | HR | BB | IBB | SO | HB | GIDP | ERA | WHIP |  | Career | vs LH |  |  |  |  |  |  |  |  |  | 246.2 | 248 | 116 | 103 | 19 | 93 | 13 | 70 | 3 | 16 | 3.76 | 1.38 |  | Career | vs RH |  |  |  |  |  |  |  |  |  | 290.1 | 316 | 148 | 139 | 37 | 66 | 6 | 139 | 12 | 19 | 4.31 | 1.32 |  |  |  | 
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| Year | Age | Lvl | Lg | Org | G | AB | R | H | 2B | 3B | HR | RBI | BB | IBB | SO | SB | CS | SH | SF | HB | GIDP | BA | OBA | SLG | OPS |  | 1976 | 20 | MLB | NL | HOU | 4 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 3 | 0 | 0 | 1 | 0 | 0 | 0 | .000 | .111 | .000 | .111 |  | 1977 | 21 | MLB | NL | HOU | 33 | 69 | 2 | 6 | 0 | 1 | 0 | 1 | 0 | 0 | 25 | 0 | 0 | 5 | 0 | 1 | 1 | .087 | .100 | .116 | .216 |  | 1978 | 22 | MLB | NL | HOU | 28 | 64 | 3 | 11 | 1 | 0 | 0 | 3 | 4 | 0 | 22 | 0 | 0 | 6 | 0 | 0 | 1 | .172 | .221 | .188 | .408 |  | Totals |  |  |  |  | G | AB | R | H | 2B | 3B | HR | RBI | BB | IBB | SO | SB | CS | SH | SF | HB | GIDP | BA | OBA | SLG | OPS |  | Career | HOU | 65 | 141 | 5 | 17 | 1 | 1 | 0 | 4 | 5 | 0 | 50 | 0 | 0 | 12 | 0 | 1 | 2 | .121 | .156 | .142 | .298 |  | Career | Majors | 65 | 141 | 5 | 17 | 1 | 1 | 0 | 4 | 5 | 0 | 50 | 0 | 0 | 12 | 0 | 1 | 2 | .121 | .156 | .142 | .298 |  |  |  | 
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| Year | Age | Lvl | Lg | Org | G | AB | R | H | 2B | 3B | HR | RBI | BB | IBB | SO | SB | CS | SH | SF | HB | GIDP | BA | OBA | SLG | OPS |  | 1976 | 20 | MLB | NL | HOU |  | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .250 | .000 | .250 |  | 1976 | 20 | MLB | NL | HOU |  | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 1 | 0 | 0 | 0 | .000 | .000 | .000 | .000 |  | 1977 | 21 | MLB | NL | HOU |  | 25 | 1 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 10 | 0 | 0 | 1 | 0 | 0 | 1 | .120 | .120 | .120 | .240 |  | 1977 | 21 | MLB | NL | HOU |  | 44 | 1 | 3 | 0 | 1 | 0 | 1 | 0 | 0 | 15 | 0 | 0 | 4 | 0 | 1 | 0 | .068 | .089 | .114 | .203 |  | 1978 | 22 | MLB | NL | HOU |  | 21 | 2 | 2 | 0 | 0 | 0 | 1 | 0 | 0 | 11 | 0 | 0 | 3 | 0 | 0 | 0 | .095 | .095 | .095 | .190 |  | 1978 | 22 | MLB | NL | HOU |  | 43 | 1 | 9 | 1 | 0 | 0 | 2 | 4 | 0 | 11 | 0 | 0 | 3 | 0 | 0 | 1 | .209 | .277 | .233 | .509 |  | Totals |  |  |  |  | G | AB | R | H | 2B | 3B | HR | RBI | BB | IBB | SO | SB | CS | SH | SF | HB | GIDP | BA | OBA | SLG | OPS |  | Career | vs LH |  | 49 | 3 | 5 | 0 | 0 | 0 | 1 | 1 | 0 | 22 | 0 | 0 | 4 | 0 | 0 | 1 | .102 | .120 | .102 | .222 |  | Career | vs RH |  | 92 | 2 | 12 | 1 | 1 | 0 | 3 | 4 | 0 | 28 | 0 | 0 | 8 | 0 | 1 | 1 | .130 | .175 | .163 | .338 |  |  |  | 
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