| year | team name | league | level | mlb | # | age | w | l | era | g | gs | cg | sho | gr | gf | sv | ip | h | r | er | hr | bb | so | wp | bk | hb | whip | h9 | hr9 | bb9 | so9 | ra9 | so/bb |
| 1977 | Bristol Red Sox | East | AA | BOS | - | 22 | 4 | 3 | 2.29 | 7 | 7 | 5 | 0 | 0 | 0 | 0 | 59.0 | 55 | 19 | 15 | 2 | 21 | 40 | 2 | 0 | 0 | 1.29 | 8.39 | 0.31 | 3.20 | 6.10 | 2.90 | 1.90 |
| 1977 | Pawtucket Red Sox | IL | AAA | BOS | - | 22 | 5 | 9 | 3.07 | 19 | 19 | 4 | 1 | 0 | 0 | 0 | 123.0 | 114 | 65 | 42 | 7 | 58 | 60 | 6 | 0 | 0 | 1.40 | 8.34 | 0.51 | 4.24 | 4.39 | 4.76 | 1.03 |
| 1978 | Pawtucket Red Sox | IL | AAA | BOS | - | 23 | 13 | 7 | 2.91 | 24 | 23 | 5 | 3 | 1 | 0 | 0 | 170.0 | 169 | 71 | 55 | 9 | 75 | 104 | 9 | 1 | 7 | 1.44 | 8.95 | 0.48 | 3.97 | 5.51 | 3.76 | 1.39 |
| 1979 | Pawtucket Red Sox | IL | AAA | BOS | - | 24 | 1 | 0 | 0.00 | 3 | 2 | 1 | 1 | 1 | 0 | 0 | 17.0 | 8 | 0 | 0 | 0 | 3 | 9 | 0 | 0 | 0 | 0.65 | 4.24 | 0.00 | 1.59 | 4.76 | 0.00 | 3.00 |
| 1979 | Boston Red Sox | AL | MLB | BOS | 42 | 24 | 8 | 5 | 3.82 | 20 | 16 | 4 | 1 | 4 | 2 | 1 | 103.2 | 97 | 47 | 44 | 7 | 41 | 41 | 3 | 0 | 3 | 1.33 | 8.42 | 0.61 | 3.56 | 3.56 | 4.08 | 1.00 |
| 1980 | Boston Red Sox | AL | MLB | BOS | 42 | 25 | 8 | 3 | 4.86 | 16 | 13 | 2 | 1 | 3 | 1 | 0 | 87.0 | 92 | 49 | 47 | 7 | 41 | 43 | 4 | 0 | 2 | 1.53 | 9.52 | 0.72 | 4.24 | 4.45 | 5.07 | 1.05 |
| 1981 | Pawtucket Red Sox | IL | AAA | BOS | - | 26 | 1 | 1 | 3.15 | 4 | 4 | 0 | 0 | 0 | 0 | 0 | 20.0 | 23 | 8 | 7 | 2 | 6 | 16 | 1 | 0 | 0 | 1.45 | 10.35 | 0.90 | 2.70 | 7.20 | 3.60 | 2.67 |
| 1981 | Boston Red Sox | AL | MLB | BOS | 42 | 26 | 0 | 1 | 2.70 | 11 | 2 | 0 | 0 | 9 | 3 | 0 | 40.0 | 39 | 21 | 12 | 2 | 13 | 20 | 1 | 0 | 0 | 1.30 | 8.78 | 0.45 | 2.93 | 4.50 | 4.73 | 1.54 |
| 1982 | Boston Red Sox | AL | MLB | BOS | 42 | 27 | 7 | 5 | 5.02 | 27 | 25 | 3 | 3 | 2 | 0 | 0 | 129.0 | 146 | 75 | 72 | 14 | 63 | 57 | 2 | 0 | 2 | 1.62 | 10.19 | 0.98 | 4.40 | 3.98 | 5.23 | 0.90 |
| 1983 | Chicago Cubs | NL | MLB | CHN | 30 | 28 | 14 | 13 | 4.48 | 34 | 34 | 1 | 1 | 0 | 0 | 0 | 191.0 | 219 | 109 | 95 | 17 | 74 | 84 | 7 | 1 | 3 | 1.53 | 10.32 | 0.80 | 3.49 | 3.96 | 5.14 | 1.14 |
| 1984 | Chicago Cubs | NL | MLB | CHN | 30 | 29 | 5 | 7 | 4.28 | 17 | 16 | 0 | 0 | 1 | 0 | 0 | 88.1 | 102 | 55 | 42 | 4 | 38 | 45 | 3 | 0 | 2 | 1.58 | 10.39 | 0.41 | 3.87 | 4.58 | 5.60 | 1.18 |
| 1984 | Oakland Athletics | AL | MLB | OAK | 30 | 29 | 1 | 1 | 6.75 | 16 | 0 | 0 | 0 | 16 | 8 | 1 | 30.2 | 43 | 27 | 23 | 2 | 17 | 10 | 2 | 0 | 0 | 1.96 | 12.62 | 0.59 | 4.99 | 2.93 | 7.92 | 0.59 |
| Tot: | MLB (6 yrs) | MLB | 43 | 35 | 4.50 | 141 | 106 | 10 | 6 | 14 | 35 | 2 | 669.2 | 738 | 383 | 335 | 53 | 287 | 300 | 22 | 1 | 12 | 1.53 | 9.92 | 0.71 | 3.86 | 4.03 | 5.15 | 1.05 | ||||
| Tot: | AL (5 yrs) | AL | 24 | 15 | 4.57 | 90 | 56 | 9 | 5 | 14 | 34 | 2 | 390.1 | 417 | 219 | 198 | 32 | 175 | 171 | 12 | 0 | 7 | 1.52 | 9.61 | 0.74 | 4.04 | 3.94 | 5.05 | 0.98 | ||||
| Tot: | NL (2 yrs) | NL | 19 | 20 | 4.41 | 51 | 50 | 1 | 1 | 0 | 1 | 0 | 279.1 | 321 | 164 | 137 | 21 | 112 | 129 | 10 | 1 | 5 | 1.55 | 10.34 | 0.68 | 3.61 | 4.16 | 5.28 | 1.15 | ||||
| Tot: | Minors (4 yrs) | Minors | 24 | 20 | 2.75 | 57 | 55 | 15 | 5 | 0 | 2 | 0 | 389.0 | 369 | 163 | 119 | 20 | 163 | 229 | 18 | 1 | 7 | 1.37 | 8.54 | 0.46 | 3.77 | 5.30 | 3.77 | 1.40 | ||||
| Tot: | AA (1 yrs) | AA | 4 | 3 | 2.29 | 7 | 7 | 5 | 0 | 0 | 0 | 0 | 59.0 | 55 | 19 | 15 | 2 | 21 | 40 | 2 | 0 | 0 | 1.29 | 8.39 | 0.31 | 3.20 | 6.10 | 2.90 | 1.90 | ||||
| Tot: | AAA (4 yrs) | AAA | 20 | 17 | 2.84 | 50 | 48 | 10 | 5 | 0 | 2 | 0 | 330.0 | 314 | 144 | 104 | 18 | 142 | 189 | 16 | 1 | 7 | 1.38 | 8.56 | 0.49 | 3.87 | 5.15 | 3.93 | 1.33 | ||||
| Avg: | MLB - 162 Inning avg | MLB | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 162 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | ||||
| Avg: | Minors - 162 Inning avg | College | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 162 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 |
| year | team name | league | level | mlb | # | age | pos | tbc+ | g | ab | r | h | 2b | 3b | hr | rbi | sb | cs | bb | so | hbp | sh | sf | ibb | gdp | tb | pa | xbh | 1b | avg | obp | slg | ops | seca | iso | babip | bb% | so% | so/bb | ab/hr |
| 1983 | Chicago Cubs | NL | MLB | CHN | 30 | 28 | P | 34 | 56 | 4 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 6 | 20 | 0 | 10 | 0 | 0 | 0 | 9 | 72 | 0 | 9 | .161 | .242 | .161 | .403 | .107 | .000 | .250 | 8.33 | 27.78 | 3.33 | 0.00 | |
| 1984 | Chicago Cubs | NL | MLB | CHN | 30 | 29 | P | 17 | 31 | 2 | 3 | 0 | 0 | 0 | 3 | 0 | 0 | 2 | 12 | 0 | 1 | 0 | 0 | 0 | 3 | 34 | 0 | 3 | .097 | .152 | .097 | .249 | .065 | .000 | .158 | 5.88 | 35.29 | 6.00 | 0.00 | |
| Tot: | MLB (2 yrs) | MLB | 51 | 87 | 6 | 12 | 0 | 0 | 0 | 3 | 0 | 0 | 8 | 32 | 0 | 11 | 0 | 0 | 0 | 12 | 106 | 0 | 12 | .138 | .211 | .138 | .348 | .092 | .000 | .218 | 7.55 | 30.19 | 4.00 | |||||||
| Tot: | NL (2 yrs) | NL | 51 | 87 | 6 | 12 | 0 | 0 | 0 | 3 | 0 | 0 | 8 | 32 | 0 | 11 | 0 | 0 | 0 | 12 | 106 | 0 | 12 | .138 | .211 | .138 | .348 | .092 | .000 | .218 | 7.55 | 30.19 | 4.00 | |||||||
| Tot: | Minors (1 yrs) | Minors | 26 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||||||||||||
| Tot: | AA (1 yrs) | AA | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||||||||||||
| Tot: | AAA (1 yrs) | AAA | 19 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||||||||||||
| Avg: | MLB - 162 game avg | MLB | 162 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | ||||||
| Avg: | Minors - 162 game avg | College | 162 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 |
| Strikeouts | Walks | Hittable | SO/BB | vs Power | Durability | Team Success |
| 36 | 51 | 45 | 44 | 45 | 57 | .523 |