Houston Astros players with a 20+ win season
10 players
10 players have had a 20+ win season for the Houston Astros. Joe Niekro and Roy Oswalt did it twice each. On a roster now: Justin Verlander and Gerrit Cole.
| Player | Pos | Seasons | Best |
|---|---|---|---|
| Joe Niekro | RP | 1979–1980 | 21 |
| Roy Oswalt | SP | 2004–2005 | 20 |
| Mike Hampton | SP | 1999 | 22 |
| Jose Lima | SP | 1999 | 21 |
| Justin Verlander | SP | 2019 | 21 |
| Dallas Keuchel | SP | 2015 | 20 |
| Gerrit Cole | SP | 2019 | 20 |
| J.R. Richard | SP | 1976 | 20 |
| Larry Dierker | P | 1969 | 20 |
| Mike Scott | SP | 1989 | 20 |
Reached with the club in one regular season. Every season since 1876 is on file. A season split between two clubs is filed as one combined line and counts for neither.