P · 9 seasons · 1982 – 1990 · B/T: R/R
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1982 | PIT | 10 | -2.37 | #791 | #93,412 |
| 1983 | PIT | 49 | -2.70 | #901 | #104,734 |
| 1984 | PIT | 27 | -2.40 | #806 | #95,100 |
| 1985 | PIT | 63 | -2.67 | #883 | #104,064 |
| 1986 | PIT | 52 | -2.35 | #738 | #91,733 |
| 1987 | NYY | 23 | -2.28 | #490 | #85,052 |
| 1988 | NYY | 63 | -2.22 | #479 | #78,807 |
| 1989 | TEX | 50 | -2.25 | #520 | #82,566 |
| 1990★ | CLE | 26 | -2.19 | #504 | #75,986 |
★ Best season by Z
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1982 | PIT | 10 | -1.85 | #219 | #29,748 |
| 1983 | PIT | 49 | 1.55 | #104 | #12,888 |
| 1984 | PIT | 27 | -0.38 | #167 | #20,155 |
| 1985★ | PIT | 63 | 3.24 | #71 | #8,558 |
| 1986 | PIT | 52 | 1.38 | #116 | #13,396 |
| 1987 | NYY | 23 | -1.55 | #229 | #26,990 |
| 1988 | NYY | 63 | 3.12 | #84 | #8,806 |
| 1989 | TEX | 50 | -0.19 | #163 | #19,276 |
| 1990 | CLE | 26 | -1.40 | #255 | #25,925 |
★ Best season by Z