| 1966 | Sioux Falls | Northern | A | - | cin | 18 | - | 12 | | 104.0 | 1.82 | 1.02 | 6.58 | -- | 2.60 | 14.11 | 0.18 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0-0 | 0 | -- |
| 1967 | Cincinnati | NL | MLB | 38 | cin | 19 | 5 | 33 | 32 | 226.2 | 2.58 | 1.12 | 7.66 | 0.71 | 2.46 | 8.18 | 0.30 | 0.68 | 23 | 5 | 848 | .228 | 932 | -- | -- | -- | -- | 87-75 | 4 | Dave Bristol |
| 1968 | Tampa | FSL | A+ | - | cin | 20 | - | 2 | | 5.0 | 3.60 | 2.00 | 9.00 | -- | 9.00 | 14.40 | 0.63 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0-0 | 0 | -- |
| | Cincinnati | NL | MLB | 38 | cin | 20 | - | 23 | 22 | 150.0 | 2.40 | 1.03 | 6.30 | 0.60 | 2.94 | 6.66 | 0.44 | 0.54 | 16 | 3 | 536 | .196 | 596 | -- | -- | -- | -- | 83-79 | 4 | Dave Bristol |
| 1969 | Indianapolis | Amer | AAA | - | cin | 21 | - | 7 | | 31.0 | 2.90 | 0.74 | 5.23 | -- | 1.45 | 9.87 | 0.15 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0-0 | 0 | -- |
| | Cincinnati | NL | MLB | 38 | cin | 21 | - | 16 | 15 | 108.2 | 3.56 | 1.31 | 8.45 | 0.91 | 3.31 | 6.87 | 0.48 | 0.66 | 9 | 0 | 413 | .247 | 458 | 0.18 | 23.8 | 76.2 | 13.1 | 89-73 | 3 | Dave Bristol |
| 1970 | Cincinnati | NL | MLB | 38 | cin | 22 | 8 | 37 | 37 | 250.2 | 3.27 | 1.28 | 8.11 | 0.90 | 3.45 | 6.50 | 0.53 | 0.83 | 26 | 1 | 942 | .240 | 1052 | -- | -- | -- | -- | 102-60 | 1 | Sparky Anderson |
| 1971 | Cincinnati | NL | MLB | 38 | cin | 23 | 16 | 35 | 35 | 244.2 | 3.16 | 1.09 | 7.65 | 0.44 | 2.17 | 5.37 | 0.40 | 0.97 | 22 | 2 | 917 | .227 | 991 | -- | -- | -- | -- | 79-83 | 5 | Sparky Anderson |
| 1972 | Cincinnati | NL | MLB | 38 | cin | 24 | 7 | 25 | 25 | 176.0 | 1.99 | 1.01 | 7.52 | 0.66 | 1.53 | 4.60 | 0.33 | 0.82 | 19 | 1 | 649 | .227 | 689 | -- | -- | -- | -- | 95-59 | 1 | Sparky Anderson |
| 1973 | Cincinnati | NL | MLB | 38 | cin | 25 | - | 2 | 2 | 10.1 | 3.48 | 1.26 | 5.23 | 0.87 | 6.10 | 2.61 | 2.33 | 0.47 | 1 | 0 | 36 | .167 | 44 | -- | -- | -- | -- | 99-63 | 1 | Sparky Anderson |
| 1975 | Cincinnati | NL | MLB | 38 | cin | 27 | 16 | 32 | 32 | 210.2 | 3.16 | 1.10 | 8.63 | 0.77 | 1.24 | 3.16 | 0.39 | 0.60 | 19 | 1 | 806 | .251 | 852 | -- | -- | -- | -- | 108-54 | 1 | Sparky Anderson |
| 1976 | Cincinnati | NL | MLB | 38 | cin | 28 | 10 | 34 | 34 | 239.1 | 3.46 | 1.08 | 8.72 | 1.05 | 1.02 | 4.25 | 0.24 | 0.76 | 24 | 1 | 914 | .254 | 951 | -- | -- | -- | -- | 102-60 | 1 | Sparky Anderson |
| 1977 | California | AL | MLB | 38 | cal | 29 | - | 5 | 5 | 18.1 | 8.84 | 1.80 | 15.22 | 2.45 | 0.98 | 1.96 | 0.50 | 0.53 | 0 | 0 | 85 | .365 | 89 | -- | -- | -- | -- | 74-88 | 5 | Dave Garcia, Norm Sherry |
| | Cincinnati | NL | MLB | 38 | cin | 29 | - | 8 | 8 | 39.1 | 4.81 | 1.65 | 12.13 | 1.14 | 2.75 | 6.41 | 0.43 | 1.05 | 0 | 0 | 0 | -- | 0 | -- | -- | -- | -- | 88-74 | 2 | Sparky Anderson |
| Minor League Totals (3 years) | 21 | 0 | 140 | 0 | 0.99 | 6.36 | 0.00 | 2.57 | 13.18 | 0.20 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | |
| AAA Totals (1 year) | 7 | 0 | 31 | 0 | 0.74 | 5.23 | 0.00 | 1.45 | 9.87 | 0.15 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | |
| A+ Totals (1 year) | 2 | 0 | 5 | 0 | 2.00 | 9.00 | 0.00 | 9.00 | 14.40 | 0.62 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | |
| A Totals (1 year) | 12 | 0 | 104 | 0 | 1.02 | 6.58 | 0.00 | 2.60 | 14.11 | 0.18 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | |