On August 5, 1984 — Cliff Johnson hits his 19th career pinch-hit home run, breaking a major league record shared with Jerry Lynch, who established the mark in 1966 playing with the Pirates. The eight-inning round-tripper off Tippy Martinez proves to be the difference in Toronto’s 4-3 victory over the Orioles at Baltimore’s Memorial Stadium.

Source:
Baseball Reference August 5
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game