On August 12, 1961 — 1961 – At Griffith Stadium‚ Roger Maris belts his 43rd homer‚ off Dick Donovan‚ but it’s New York’s only score as they lose‚ 5 – 1‚ the Yanks’ first loss in 10 games. For Washington, it is their first win in 8 games. Gene Green’s pinch grand slam off Luis Arroyo is the big blow for the Nats.

Source:
Baseball Reference August 12
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game