| 1966 |
|
The Astros' Number one pick in the January Supplemental Free Agent Draft |
| Became one of the few Astro minor leaguers to pitch for the Bismarck-Mandan Pards, the one year the Astros had this Northern League entry. Finished the year at AA Amarillo |
| 1967 |
| Split the year between single A Asheville (where he was 3 - 4) and AAA Oklahoma City (where he went 0 - 5) |
| 1968 |
| Went 7 - 14 for the '89ers in a full year, striking out 144 |
| 1969 |
| Struck out 200 for the Astros at the age of 21, and was named Sporting News Rookie Pitcher of the Year |
| Combined with Larry Dierker and Don Wilson to make the Astros only the second team in major league history to have three pitchers with 200 strikeouts each in the same season yet not win the pennant |
| 1970 |
| Despite his one-hit shutout of the Pads April 19, a classic case of sophomore slump left him with a 3 - 13 record and a 5.76 ERA for Houston; this very slump landed him in Oklahoma City by the end of the year |
1971
|
| Spent most of the year at AAA Oklahoma City, where he pitched 7 complete games and compiled a 3.11 ERA; when he got called up, he responded with a disappointing 0 - 6 and a 4.74 |
1972
|
| Went 5- 4 with a 3.26 for the big club, including his May 23 shutout of the Padres on four hits |
1974
|
| After two years of spot duty, re-entered the regualr starting rotation, and had arguably his best year: 14 - 10 with a 3.54 and 110 K's; One-hits the Pirates, 2-1, outdueling acid veteran Dock Ellis for the victory. Milt May triples home Watson with the winning run. |
| August 27: New York Met Benny Ayala becomes the first NL guy in 13 years to homer in his first ML at-bat; the Met rookie went yard off Griffin in New York's 4-2 win. |
| 1976 |
| Sent to the Padres for waiver claim August 3 |
