Highest Single Season Astro ERA

Franchise History (1962-2023)

Minimum 30 Innings pitched:

1. Ryan Bowen: 10.96 (1992)
2. Phillip Humber: 7.90 (2013)
3. Yorman Bazardo: 7.88 (2009)
4. Rafael Montero: 7.76 (2023)
5. Julio Solano: 7.59 (1986)
6. Dave Borkowski: 7.50 (2008)
7. Jose Lima: 7.30 (2001)
8. Scott Elarton: 7.14 (2001)
9. Brandon Duckworth: 6.86 (2004)
10. Brandon Bielak: 6.75 (2020)