On May 13, 1980 — At Riverfront Stadium, Ray Knight of the Cincinnati Reds hits two home runs in the 5th inning – including a grand slam – to lead the Reds to a 15 – 4 rout of the New York Mets . Knight was in an 0-15 slump before the 5th inning. Only 11 National Leaguers did it before. . .Willie Mc
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Source: Historical record