On August 8, 1976 — Padres rookie Butch Metzger (10-0) is credited with a 4 – 3 victory over the Astros‚ his 10th win without a defeat. With a victory in each of the previous two seasons as well‚ Metzger’s mark of 12-0 to start a career matches Hooks Wiltse‚ in 1904. Metzger will lose his last four decisions this year.

Source:
Baseball Reference August 8
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game