| 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 |
| 1968 | California Angels | AL | MLB | CAL | 39 | 24 | 1 | 4 | 4.33 | 56 | 2 | 0 | 0 | 54 | 24 | 5 | 72.2 | 65 | 41 | 35 | 5 | 24 | 33 | 1 | 0 | 0 | 1.22 | 8.05 | 0.62 | 2.97 | 4.09 | 5.08 | 1.38 |
| 1969 | Kansas City Royals | AL | MLB | KCA | 34 | 25 | 3 | 1 | 4.17 | 31 | 0 | 0 | 0 | 31 | 12 | 0 | 54.0 | 67 | 31 | 25 | 5 | 21 | 23 | 2 | 0 | 1 | 1.63 | 11.17 | 0.83 | 3.50 | 3.83 | 5.17 | 1.10 |
| 1970 | Kansas City Royals | AL | MLB | KCA | 22 | 26 | 6 | 6 | 3.16 | 41 | 0 | 0 | 0 | 41 | 17 | 1 | 68.1 | 59 | 31 | 24 | 6 | 23 | 43 | 2 | 0 | 0 | 1.20 | 7.77 | 0.79 | 3.03 | 5.66 | 4.08 | 1.87 |
| 1971 | Kansas City Royals | AL | MLB | KCA | 22 | 27 | 9 | 7 | 1.73 | 67 | 0 | 0 | 0 | 67 | 34 | 17 | 88.1 | 71 | 23 | 17 | 3 | 30 | 44 | 2 | 0 | 7 | 1.14 | 7.23 | 0.31 | 3.06 | 4.48 | 2.34 | 1.47 |
| 1972 | Kansas City Royals | AL | MLB | KCA | 22 | 28 | 6 | 2 | 4.23 | 51 | 0 | 0 | 0 | 51 | 30 | 9 | 55.1 | 67 | 32 | 26 | 0 | 33 | 18 | 0 | 0 | 1 | 1.81 | 10.90 | 0.00 | 5.37 | 2.93 | 5.20 | 0.55 |
| 1973 | Kansas City Royals | AL | MLB | KCA | 22 | 29 | 0 | 0 | 5.40 | 6 | 0 | 0 | 0 | 6 | 5 | 1 | 10.0 | 13 | 6 | 6 | 2 | 4 | 4 | 1 | 0 | 1 | 1.70 | 11.70 | 1.80 | 3.60 | 3.60 | 5.40 | 1.00 |
| 1974 | Minnesota Twins | AL | MLB | MIN | 19 | 30 | 5 | 3 | 4.52 | 50 | 0 | 0 | 0 | 50 | 25 | 4 | 91.2 | 92 | 46 | 46 | 7 | 26 | 34 | 3 | 0 | 2 | 1.29 | 9.03 | 0.69 | 2.55 | 3.34 | 4.52 | 1.31 |
| 1975 | Minnesota Twins | AL | MLB | MIN | 19 | 31 | 5 | 8 | 3.09 | 46 | 0 | 0 | 0 | 46 | 37 | 11 | 75.2 | 76 | 32 | 26 | 7 | 23 | 41 | 1 | 0 | 1 | 1.31 | 9.04 | 0.83 | 2.74 | 4.88 | 3.81 | 1.78 |
| 1976 | Minnesota Twins | AL | MLB | MIN | 19 | 32 | 8 | 1 | 2.50 | 57 | 0 | 0 | 0 | 57 | 22 | 1 | 115.1 | 95 | 36 | 32 | 11 | 29 | 45 | 2 | 2 | 2 | 1.08 | 7.41 | 0.86 | 2.26 | 3.51 | 2.81 | 1.55 |
| 1977 | Minnesota Twins | AL | MLB | MIN | 19 | 33 | 6 | 4 | 5.09 | 61 | 0 | 0 | 0 | 61 | 20 | 7 | 97.1 | 113 | 56 | 55 | 15 | 33 | 35 | 3 | 2 | 2 | 1.50 | 10.45 | 1.39 | 3.05 | 3.24 | 5.18 | 1.06 |
| 1978 | Boston Red Sox | AL | MLB | BOS | 16 | 34 | 2 | 1 | 4.40 | 35 | 1 | 0 | 0 | 34 | 13 | 4 | 61.1 | 74 | 33 | 30 | 7 | 23 | 24 | 0 | 0 | 3 | 1.58 | 10.86 | 1.03 | 3.38 | 3.52 | 4.84 | 1.04 |
| 1979 | Boston Red Sox | AL | MLB | BOS | 16 | 35 | 3 | 2 | 2.74 | 44 | 0 | 0 | 0 | 44 | 24 | 4 | 88.2 | 89 | 32 | 27 | 8 | 16 | 60 | 1 | 0 | 4 | 1.18 | 9.03 | 0.81 | 1.62 | 6.09 | 3.25 | 3.75 |
| 1980 | Boston Red Sox | AL | MLB | BOS | 16 | 36 | 5 | 4 | 2.00 | 62 | 0 | 0 | 0 | 62 | 39 | 24 | 99.0 | 87 | 30 | 22 | 3 | 20 | 54 | 1 | 0 | 2 | 1.08 | 7.91 | 0.27 | 1.82 | 4.91 | 2.73 | 2.70 |
| 1981 | Boston Red Sox | AL | MLB | BOS | 16 | 37 | 4 | 5 | 2.87 | 32 | 0 | 0 | 0 | 32 | 21 | 6 | 59.2 | 61 | 23 | 19 | 5 | 17 | 35 | 0 | 0 | 4 | 1.31 | 9.20 | 0.75 | 2.56 | 5.28 | 3.47 | 2.06 |
| 1982 | Boston Red Sox | AL | MLB | BOS | 16 | 38 | 7 | 0 | 2.29 | 40 | 0 | 0 | 0 | 40 | 17 | 2 | 102.1 | 98 | 30 | 26 | 6 | 22 | 44 | 1 | 1 | 2 | 1.17 | 8.62 | 0.53 | 1.93 | 3.87 | 2.64 | 2.00 |
| 1983 | Oakland Athletics | AL | MLB | OAK | 39 | 39 | 6 | 7 | 2.81 | 49 | 0 | 0 | 0 | 49 | 22 | 4 | 96.0 | 89 | 33 | 30 | 2 | 32 | 39 | 2 | 2 | 0 | 1.26 | 8.34 | 0.19 | 3.00 | 3.66 | 3.09 | 1.22 |
| 1984 | Oakland Athletics | AL | MLB | OAK | 39 | 40 | 3 | 0 | 2.35 | 17 | 0 | 0 | 0 | 17 | 8 | 2 | 23.0 | 15 | 6 | 6 | 2 | 8 | 8 | 1 | 0 | 0 | 1.00 | 5.87 | 0.78 | 3.13 | 3.13 | 2.35 | 1.00 |
| Tot: | MLB (17 yrs) | MLB | 79 | 55 | 3.23 | 745 | 3 | 0 | 0 | 370 | 742 | 102 | 1258.2 | 1231 | 521 | 452 | 94 | 384 | 584 | 23 | 7 | 32 | 1.28 | 8.80 | 0.67 | 2.75 | 4.18 | 3.73 | 1.52 | ||||
| Tot: | AL (17 yrs) | AL | 79 | 55 | 3.23 | 745 | 3 | 0 | 0 | 370 | 742 | 102 | 1258.2 | 1231 | 521 | 452 | 94 | 384 | 584 | 23 | 7 | 32 | 1.28 | 8.80 | 0.67 | 2.75 | 4.18 | 3.73 | 1.52 | ||||
| Avg: | MLB - 162 Inning avg | MLB | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 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 |
| 1968 | California Angels | AL | MLB | CAL | 39 | 24 | P | 71 | 2 | 7 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | .000 | .333 | .000 | .333 | 1.000 | .000 | .000 | 33.33 | 0.00 | 0.00 | 0.00 | |
| 1969 | Kansas City Royals | AL | MLB | KCA | 34 | 25 | P | 47 | 18 | 7 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 3 | 18 | 0 | 3 | .167 | .167 | .167 | .334 | .000 | .000 | .214 | 0.00 | 22.22 | 0.00 | 0.00 | |
| 1970 | Kansas City Royals | AL | MLB | KCA | 22 | 26 | P | 42 | 14 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 5 | 0 | 1 | 0 | 0 | 0 | 2 | 16 | 0 | 2 | .143 | .200 | .143 | .343 | .071 | .000 | .222 | 6.25 | 31.25 | 5.00 | 0.00 | |
| 1971 | Kansas City Royals | AL | MLB | KCA | 22 | 27 | P | 68 | 20 | 2 | 5 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 7 | 0 | 0 | 0 | 0 | 0 | 7 | 21 | 2 | 3 | .250 | .286 | .350 | .636 | .150 | .100 | .385 | 4.76 | 33.33 | 7.00 | 0.00 | |
| 1972 | Kansas City Royals | AL | MLB | KCA | 22 | 28 | P | 51 | 12 | 2 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 4 | 12 | 0 | 4 | .333 | .333 | .333 | .666 | .000 | .000 | .500 | 0.00 | 33.33 | 0.00 | 0.00 | |
| Tot: | MLB (6 yrs) | MLB | 330 | 66 | 20 | 14 | 2 | 0 | 0 | 0 | 1 | 0 | 3 | 20 | 0 | 1 | 0 | 0 | 0 | 16 | 70 | 2 | 12 | .212 | .246 | .242 | .489 | .091 | .030 | .304 | 4.29 | 28.57 | 6.67 | |||||||
| Tot: | AL (6 yrs) | AL | 330 | 66 | 20 | 14 | 2 | 0 | 0 | 0 | 1 | 0 | 3 | 20 | 0 | 1 | 0 | 0 | 0 | 16 | 70 | 2 | 12 | .212 | .246 | .242 | .489 | .091 | .030 | .304 | 4.29 | 28.57 | 6.67 | |||||||
| Avg: | MLB - 162 game avg | MLB | 162 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 |
| Strikeouts | Walks | Hittable | SO/BB | vs Power | Durability | Team Success |
| 30 | 68 | 52 | 49 | 52 | 78 | .503 |