Mark McGwire of the Oakland Athletics becomes the first major league player to hit 30 or more home runs in each of his first four seasons.

Homerun History

SimLeague Baseball

test

On August 15, 1990, Mark McGwire of the Oakland Athletics becomes the first major league player to hit 30 or more home runs in each of his first four seasons. McGwire’s 30th home run – a dramatic walk off 10th inning grand slam – gives the A’s a 6-2 win over the Boston Red Sox.
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