On August 18, 1909, the Giants’ Arlie Latham became the oldest player to steal a base in MLB at 50 years, 5 months old


On August 18, 1909
— Giants player-coach Arlie Latham steals second base in the Giants’ 14 – 1 laugher over the Phillies. At 50, and 5 months, he is the oldest player to swipe a base.

Source:
Baseball Reference August 18
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game