Most Home Runs in a Rookie Season

Pete Alonso holds the MLB rookie record with 53 home runs in 2019, surpassing Aaron Judge's 52 in 2017 and Mark McGwire's 49 in 1987.

Sources

• Single Season Home Runs: A Complete Guide - MLB Daily Dingers
• MLB Record For Most Home Runs By A Rookie - StatMuse
• Pete Alonso has set the single season record for most home runs EVER by a rookie.
• Most Home Runs In An MLB Rookie Season | StatMuse
• Rookie With Most Home Runs - StatMuse

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