Alonzo Albert Mattern (June 16, 1883 – November 6, 1958) was a professional baseball player who pitched in the Major Leagues from 1908 to 1912. He played for the Boston Braves.

Al Mattern
Pitcher
Born: (1883-06-16)June 16, 1883
West Rush, New York, U.S.
Died: November 6, 1958(1958-11-06) (aged 75)
West Rush, New York, U.S.
Batted: Left
Threw: Left
MLB debut
September 16, 1908, for the Boston Doves
Last MLB appearance
April 19, 1912, for the Boston Braves
MLB statistics
Win–loss record36–58
Earned run average3.37
Strikeouts254
Teams
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