Ryan Braun hits his 20th home run in the majors; it comes in his 64th game. This makes him the quickest Milwaukee Brewers player to 20 career homers. Bill Schroeder, with 94 games, held the old record.

On August 5, 2007 — Ryan Braun hits his 20th home run in the majors; it comes in his 64th game. This makes him the quickest Milwaukee Brewers player to 20 career homers. Bill Schroeder, with 94 games, held the old record.

Source:
Baseball Reference August 5
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game