Gennett became the 17th player to homer four times in one game - and perhaps the least likely. A scrappy second baseman who was claimed off waivers from Milwaukee in late March, he began the night with 38 career home runs, including three this season.
Josh Hamilton was the previous player to hit four home runs in one game, for Texas against Baltimore in May 2012.
Gennett singled his first time up and then homered in four straight at-bats, including a grand slam. His 10 RBIs tied Cincinnati's club record.
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