With his 50th and 51st dingers, Cubs’ slugger Sammy Sosa joins Mark McGwire (53) of the Cardinals in hitting 50 home runs, making it only the second time two National League hitters have reached the plateau in the same season. Pirates outfielder Ralph Kiner and Giants first baseman Johnny Mize each hit a league-leading 51 round trippers in 1947.

On August 23, 1998 — With his 50th and 51st dingers, Cubs’ slugger Sammy Sosa joins Mark McGwire (53) of the Cardinals in hitting 50 home runs, making it only the second time two National League hitters have reached the plateau in the same season. Pirates outfielder Ralph Kiner and Giants first baseman Johnny Mize each hit a league-leading 51 round trippers in 1947.


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Sources:
Baseball Reference August 23
National Pastime August 23
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game