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Most strikeouts in a Major League Baseball season by a batter

Most strikeouts in a Major League Baseball season by a batter
Who
Mark Reynolds
When
2009
The Major League Baseball (MLB) record for most strikeouts in a season is 223 by Mark Reynolds (USA) playing for the Arizona Diamondbacks (USA) in 2009. He surpassed his own mark of 204 established in 2008.