Marcelo Mayer
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Born
2002 (22 years old)
Chula Vista, California, U.S.Position
Infielder
Status
Active
Ethnicity
White
Team Number
39
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Kit
Side
Right
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BaseballTeam
Boston Red Sox
League
MLB
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Marcelo Mayer (/ˈmaɪ.ər/ MY-ər; born December 12, 2002) is an American professional baseball infielder for the Boston Red Sox of Major League Baseball (MLB). He was selected by the Red Sox in the first round, fourth overall, of the 2021 MLB draft, and made his MLB debut in 2025.
Amateur career
Mayer attended Eastlake High School in Chula Vista, California. He became Eastlake's varsity starting shortstop as a freshman in 2018. He committed to play college baseball at the University of Southern California after his freshman year. As a sophomore in 2019, he batted .261 alongside pitching to a 2.00 earned run average (ERA) over five appearances. In 2020, his junior season, he hit .294 with three home runs, six runs batted in (RBIs), and two doubles before the season was canceled due to the COVID-19 pandemic. That summer, he played in the Perfect Game All-American Classic.
As a senior in 2021, Mayer batted .392 with 14 home runs and 45 RBIs. In his final high school at bat, he hit a grand slam. He was named the Collegiate Baseball National High School Player of the Year. He was also named Mr. Baseball California State Player of the Year for the 2021 season by Cal-Hi Sports.
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