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| 1965 | Lewiston | Nwst | A- | - | kca | 21 | - | 20 | | 155.0 | 2.90 | 1.39 | 7.84 | -- | 4.70 | 6.68 | 0.70 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0-0 | 0 | -- |
| | Birmingham | Sou | AA | - | kca | 21 | - | 6 | | 35.0 | 4.63 | 1.57 | 9.26 | -- | 4.89 | 8.49 | 0.58 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0-0 | 0 | -- |
| 1966 | KC Athletics | AL | MLB | 29 | kca | 22 | - | 14 | 14 | 83.2 | 4.09 | 1.45 | 7.64 | 0.75 | 5.38 | 6.56 | 0.82 | 1.24 | 4 | 2 | 304 | .234 | 359 | -- | -- | -- | -- | 74-86 | 7 | Alvin Dark |
| 1967 | KC Athletics | AL | MLB | 29 | kca | 23 | 61 | 32 | 29 | 197.2 | 3.69 | 1.25 | 7.83 | 0.77 | 3.41 | 5.01 | 0.68 | 0.83 | 14 | 3 | 739 | .233 | 826 | -- | -- | -- | -- | 62-99 | 10 | Alvin Dark, Luke Appling |
| 1968 | Oakland | AL | MLB | 29 | oak | 24 | 21 | 35 | 34 | 225.1 | 3.00 | 1.23 | 7.87 | 0.80 | 3.20 | 6.71 | 0.48 | 1.27 | 18 | 4 | 842 | .234 | 939 | -- | -- | -- | -- | 82-80 | 6 | Bob Kennedy |
| 1969 | Oakland | AL | MLB | 29 | oak | 25 | 26 | 35 | 35 | 235.1 | 3.86 | 1.38 | 9.33 | 0.61 | 3.06 | 5.24 | 0.58 | 1.04 | 21 | 1 | 903 | .270 | 998 | -- | -- | -- | -- | 88-74 | 2 | Hank Bauer, John McNamara |
| 1970 | Oakland | AL | MLB | 29 | oak | 26 | 10 | 41 | 40 | 267.0 | 3.74 | 1.21 | 7.75 | 1.08 | 3.10 | 5.02 | 0.62 | 0.78 | 22 | 5 | 1005 | .229 | 1113 | -- | -- | -- | -- | 89-73 | 2 | John McNamara |
| 1971 | Oakland | AL | MLB | 29 | oak | 27 | 44 | 30 | 30 | 189.0 | 3.81 | 1.35 | 8.81 | 1.14 | 3.38 | 4.76 | 0.71 | 0.88 | 15 | 1 | 713 | .259 | 795 | -- | -- | -- | -- | 101-60 | 1 | Dick Williams |
| 1972 | Birmingham | Sou | AA | - | oak | 28 | - | 9 | | 19.0 | 4.74 | 1.21 | 9.00 | -- | 1.89 | 5.68 | 0.33 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0-0 | 0 | -- |
| 1973 | Oakland | AL | MLB | 29 | oak | 29 | - | 1 | 1 | 2.1 | 7.71 | 3.43 | 23.14 | 3.86 | 7.71 | 11.57 | 0.67 | 1.50 | 0 | 0 | 14 | .429 | 16 | -- | -- | -- | -- | 94-68 | 1 | Dick Williams |
| 1974 | California | AL | MLB | 45 | cal | 30 | - | 5 | 5 | 30.0 | 5.70 | 1.73 | 11.70 | 0.90 | 3.90 | 4.80 | 0.81 | 1.06 | 2 | 0 | 124 | .315 | 137 | -- | -- | -- | -- | 68-94 | 6 | Dick Williams, Bobby Winkles, Whitey Herzog |
| 1975 | California | AL | MLB | 29 | cal | 31 | - | 9 | 2 | 28.0 | 6.75 | 1.54 | 9.64 | 1.61 | 4.18 | 4.50 | 0.93 | 0.65 | 0 | 2 | 109 | .275 | 129 | -- | -- | -- | -- | 72-89 | 6 | Dick Williams |
| Minor League Totals (2 years) | 35 | 0 | 209 | 0 | 1.41 | 8.18 | 0.00 | 4.48 | 6.89 | 0.65 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | |
| AA Totals (2 years) | 15 | 0 | 54 | 0 | 1.44 | 9.17 | 0.00 | 3.83 | 7.50 | 0.51 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | |
| A- Totals (1 year) | 20 | 0 | 155 | 0 | 1.39 | 7.84 | 0.00 | 4.70 | 6.68 | 0.70 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | |