A’s rookie Mark McGwire hits his first major league home run, going deep in the fifth inning off of Walt Terrell in Oakland’s 8-4 victory at Tiger Stadium. The round-tripper is the first of 583 round-trippers that Big Mac will hit during his 16-year career.

This Day In Baseball

On August 25, 1986 — A’s rookie Mark McGwire hits his first major league home run, going deep in the fifth inning off of Walt Terrell in Oakland’s 8-4 victory at Tiger Stadium. The round-tripper is the first of 583 round-trippers that Big Mac will hit during his 16-year career.

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Sources:
Baseball Reference August 25
National Pastime August 25
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game