Edwin Frederick Gerner (July 22, 1897 – May 15, 1970), nicknamed "Lefty", was a Major League Baseball pitcher who played in five games for the Cincinnati Reds in 1919.

In 17 innings over five games, Gerner posted a 1–0 record with a 3.18 earned run average with 22 hits allowed, 10 runs allowed (6 earned), 3 walks, 2 strikeouts and 2 hit by pitch.

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