P · 15 seasons · 1980 – 1997 · B/T: L/L
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1980 | PHI | 2 | -2.20 | #469 | #77,232 |
| 1981 | PHI | 9 | -2.38 | #784 | #94,102 |
| 1983 | SF | 20 | -2.60 | #879 | #102,550 |
| 1984 | SF | 46 | -2.69 | #883 | #104,637 |
| 1985 | SF | 77 | -2.25 | #730 | #82,994 |
| 1986 | SF | 67 | -2.44 | #819 | #97,263 |
| 1987 | SD | 64 | -2.25 | #482 | #82,542 |
| 1988★ | SD | 62 | -1.86 | #402 | #47,673 |
| 1989 | SD | 70 | -2.66 | #942 | #104,021 |
| 1990 | KC | 53 | -2.19 | #504 | #75,986 |
| 1991 | KC | 29 | -2.14 | #497 | #70,857 |
| 1992 | ATL | 27 | -2.22 | #789 | #79,405 |
| 1993 | SD | 60 | -2.15 | #538 | #72,108 |
| 1994 | SD | 20 | -2.25 | #508 | #82,258 |
| 1997 | ML4 | 19 | -2.16 | #573 | #73,572 |
★ Best season by Z
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1980 | PHI | 2 | -2.44 | #260 | #38,124 |
| 1981 | PHI | 9 | -4.99 | #355 | #50,837 |
| 1983 | SF | 20 | 1.07 | #121 | #14,367 |
| 1984 | SF | 46 | -2.98 | #324 | #44,894 |
| 1985 | SF | 77 | 3.85 | #64 | #7,410 |
| 1986 | SF | 67 | 2.50 | #83 | #10,230 |
| 1987 | SF | 63 | 2.10 | #107 | #11,283 |
| 1988 | SD | 62 | 7.59 | #18 | #2,557 |
| 1989★ | SD | 70 | 9.86 | #5 | #1,172 |
| 1990 | KC | 53 | -2.23 | #333 | #34,885 |
| 1991 | KC | 29 | -0.89 | #213 | #22,736 |
| 1992 | KC | 27 | -5.00 | #437 | #50,841 |
| 1993 | SD | 60 | -1.64 | #285 | #27,705 |
| 1994 | SD | 20 | -3.35 | #431 | #47,529 |
| 1997 | ML4 | 19 | -2.33 | #379 | #36,541 |
★ Best season by Z