Montreal reliever Elroy Face gives up the last of his record 21 extra-inning gopher balls, an 11th-inning grand slam to the Reds’ Johnny Bench. Cincinnati wins, 8 – 3, in Montreal.

On August 13, 1969 — Montreal reliever Elroy Face gives up the last of his record 21 extra-inning gopher balls, an 11th-inning grand slam to the Reds’ Johnny Bench. Cincinnati wins, 8 – 3, in Montreal.

Source:
Baseball Reference August 13
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game