On August 5, 2007 — With his 246th career victory, an 8-5 win over Kansas City, Yankees right-hander Mike Mussina becomes the winningest pitcher in baseball history without a 20-win season. ‘Moose’ will reach the elusive milestone with a 20-9 record next season, his last in the majors.
Source:
Baseball Reference August 5
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game