P · 8 seasons · 1986 – 1993 · B/T: R/R
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1986 | PIT | 26 | -2.31 | #499 | #88,755 |
| 1987 | PIT | 32 | -2.37 | #810 | #93,383 |
| 1988 | PIT | 59 | -2.37 | #854 | #93,542 |
| 1989 | CWS | 22 | -2.25 | #520 | #82,565 |
| 1990 | CWS | 65 | -2.19 | #504 | #75,986 |
| 1991★ | MON | 77 | -2.18 | #793 | #74,697 |
| 1992 | PHI | 61 | -2.26 | #811 | #83,083 |
| 1993 | CWS | 6 | -2.18 | #553 | #74,941 |
★ Best season by Z
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1986 | PIT | 26 | -0.44 | #181 | #20,430 |
| 1987 | PIT | 32 | -2.96 | #349 | #44,713 |
| 1988 | PIT | 59 | 0.28 | #154 | #17,200 |
| 1989 | CWS | 22 | -0.29 | #169 | #19,762 |
| 1990★ | CWS | 65 | 2.63 | #96 | #9,903 |
| 1991 | MON | 77 | 2.42 | #109 | #10,434 |
| 1992 | PHI | 61 | -3.09 | #384 | #45,765 |
| 1993 | CWS | 6 | -2.87 | #440 | #43,818 |
★ Best season by Z