P · 16 seasons · 1967 – 1982 · B/T: L/L
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1967 | BOS | 27 | -2.16 | #384 | #73,360 |
| 1968 | BOS | 49 | -2.36 | #502 | #92,252 |
| 1969 | BOS | 71 | -2.38 | #696 | #93,566 |
| 1970 | BOS | 63 | -2.48 | #720 | #98,789 |
| 1971 | BOS | 50 | -2.02 | #396 | #54,423 |
| 1972 | NYY | 59 | -2.22 | #478 | #79,706 |
| 1973 | NYY | 51 | -2.31 | #459 | #88,838 |
| 1974 | NYY | 66 | -2.28 | #663 | #85,515 |
| 1975 | NYY | 49 | -2.32 | #470 | #89,490 |
| 1976 | NYY | 64 | -2.33 | #467 | #90,229 |
| 1977 | NYY | 72 | -2.33 | #487 | #90,439 |
| 1978 | NYY | 59 | -2.28 | #483 | #85,287 |
| 1979 | TEX | 67 | -2.29 | #466 | #87,086 |
| 1980 | TEX | 59 | -2.29 | #501 | #86,677 |
| 1981★ | PHI | 48 | -1.85 | #406 | #47,459 |
| 1982 | PHI | 45 | -2.13 | #450 | #69,333 |
★ Best season by Z
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1967 | BOS | 27 | 0.46 | #111 | #16,518 |
| 1968 | BOS | 49 | 2.15 | #69 | #11,128 |
| 1969 | BOS | 71 | 5.03 | #35 | #5,428 |
| 1970 | BOS | 63 | 1.99 | #87 | #11,593 |
| 1971 | BOS | 50 | 3.25 | #58 | #8,538 |
| 1972★ | NYY | 59 | 9.94 | #9 | #1,144 |
| 1973 | NYY | 51 | 6.71 | #16 | #3,357 |
| 1974 | NYY | 66 | 7.88 | #17 | #2,337 |
| 1975 | NYY | 49 | 1.11 | #98 | #14,258 |
| 1976 | NYY | 64 | 6.91 | #21 | #3,182 |
| 1977 | NYY | 72 | 9.48 | #15 | #1,375 |
| 1978 | NYY | 59 | 1.69 | #92 | #12,463 |
| 1979 | TEX | 67 | 4.05 | #61 | #7,024 |
| 1980 | TEX | 59 | -0.28 | #162 | #19,672 |
| 1981 | PHI | 48 | -1.01 | #185 | #23,460 |
| 1982 | PHI | 45 | -2.35 | #257 | #36,720 |
★ Best season by Z