P · 10 seasons · 1971 – 1980 · B/T: R/R
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1971 | HOU | 4 | -2.48 | #699 | #99,017 |
| 1972 | HOU | 4 | -2.23 | #480 | #79,860 |
| 1973 | HOU | 16 | -2.46 | #709 | #97,956 |
| 1974 | HOU | 15 | -2.29 | #685 | #87,316 |
| 1975 | HOU | 33 | -1.97 | #369 | #50,392 |
| 1976 | HOU | 39 | -2.68 | #772 | #104,434 |
| 1977★ | HOU | 36 | -1.71 | #369 | #44,926 |
| 1978 | HOU | 37 | -2.40 | #776 | #95,007 |
| 1979 | HOU | 38 | -3.28 | #888 | #110,132 |
| 1980 | HOU | 17 | -2.48 | #820 | #98,691 |
★ Best season by Z
| Season ↑ | Tm | G | Z | Szn | All-Time |
|---|---|---|---|---|---|
| 1971 | HOU | 4 | -1.86 | #212 | #29,841 |
| 1972 | HOU | 4 | -3.21 | #306 | #46,658 |
| 1973 | HOU | 16 | -0.15 | #127 | #19,087 |
| 1974 | HOU | 15 | -1.97 | #208 | #31,251 |
| 1975 | HOU | 33 | -0.17 | #144 | #19,155 |
| 1976 | HOU | 39 | 7.90 | #11 | #2,325 |
| 1977 | HOU | 36 | 9.70 | #13 | #1,250 |
| 1978 | HOU | 36 | 10.08 | #5 | #1,084 |
| 1979★ | HOU | 38 | 15.72 | #1 | #134 |
| 1980 | HOU | 17 | 6.49 | #27 | #3,597 |
★ Best season by Z