P · 12 seasons · 1979 – 1992 · B/T: L/L
Few careers score higher: Jerry Don Gleaton sits 1st of 0 pitchers all-time in roto value, built over 12 seasons. 1990 was the high-water mark, worth +3.3, 82nd that season and 8372nd of 51,303 player-seasons on record.
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1979 | TEX | 5 | -2.29 | #466 | #87,119 |
| 1980 | TEX | 5 | -2.29 | #501 | #86,710 |
| 1981 | SEA | 20 | -2.26 | #504 | #83,137 |
| 1982 | SEA | 3 | -2.23 | #491 | #80,431 |
| 1984 | CWS | 11 | -2.28 | #520 | #85,750 |
| 1985 | CWS | 31 | -2.24 | #482 | #81,373 |
| 1987 | KC | 48 | -2.28 | #490 | #85,085 |
| 1988 | KC | 42 | -2.22 | #479 | #78,842 |
| 1989 | KC | 15 | -2.25 | #520 | #82,600 |
| 1990 | DET | 57 | -2.19 | #504 | #76,022 |
| 1991★ | DET | 47 | -2.14 | #497 | #70,891 |
| 1992 | PIT | 23 | -2.26 | #811 | #83,118 |
★ Best season by Z
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1979 | TEX | 5 | -2.95 | #323 | #44,717 |
| 1980 | TEX | 5 | -2.50 | #264 | #39,189 |
| 1981 | SEA | 20 | -2.87 | #297 | #43,990 |
| 1982 | SEA | 3 | -3.28 | #332 | #47,268 |
| 1984 | CWS | 11 | -2.03 | #241 | #32,000 |
| 1985 | CWS | 31 | -2.66 | #310 | #41,502 |
| 1987 | KC | 48 | 0.26 | #160 | #17,303 |
| 1988 | KC | 42 | -1.24 | #206 | #24,881 |
| 1989 | KC | 15 | -2.82 | #376 | #43,446 |
| 1990★ | DET | 57 | 3.34 | #82 | #8,372 |
| 1991 | DET | 47 | -1.24 | #235 | #24,842 |
| 1992 | PIT | 23 | -2.63 | #333 | #41,007 |
★ Best season by Z