P · 6 seasons · 1974 – 1979 · B/T: L/R
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1974 | CHC | 43 | -2.59 | #802 | #102,230 |
| 1975 | OAK | 58 | -2.32 | #470 | #89,490 |
| 1976 | OAK | 49 | -2.33 | #467 | #90,229 |
| 1977 | CHC | 20 | -2.36 | #704 | #92,606 |
| 1978★ | SEA | 49 | -2.28 | #483 | #85,287 |
| 1979 | OAK | 51 | -2.29 | #466 | #87,086 |
★ Best season by Z
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1974 | CHC | 43 | -0.58 | #143 | #21,076 |
| 1975★ | OAK | 58 | 5.59 | #24 | #4,629 |
| 1976 | OAK | 49 | -0.92 | #151 | #22,904 |
| 1977 | CHC | 20 | -4.63 | #367 | #50,592 |
| 1978 | SEA | 49 | -2.41 | #251 | #37,708 |
| 1979 | OAK | 51 | -5.71 | #389 | #51,053 |
★ Best season by Z