In a 21-year major league career, Simmons played in 2,456 games accumulating 2,472 hits in 8,680 at bats for a .285 career batting average along with 248 home runs, 1,389 runs batted in and a .348 on-base percentage. He ended his career with a .986 fielding percentage. An eight-time All-Star, he batted above .300 seven times, reached 20 home runs six times, and eight times exceeded 90 runs batted in. Simmons held major league records for catchers with 2,472 career hits and 483 doubles. He ranks second all-time among catchers with 1,389 runs batted in and 10th with 248 home runs.