<P> Randall Pennington Gumpert (January 23, 1918--November 25, 2008) was a Major League Baseball pitcher, playing for five different teams throughout his career . He was born in Monocacy, Pennsylvania . His pro career began when he was signed by the Philadelphia Athletics as a free agent before the 1936 season, at the age of 18 . Even before that, he threw batting practice for the Athletics in Shibe Park as far back as 1934 before he was signed to the team . He pitched three seasons of relief in Philadelphia before being traded to the New York Yankees in July 1939 . </P> <P> Gumpert spent a few years in the minors before deciding to enter military service . He served in World War II as a member of the United States Coast Guard . After finishing his time in the military, he was able to make it to the major league roster for the 1946 season . He played well in his first season as a Yankee, earning an 11--3 record with an earned run average of 2.31 . Gumpert played fewer innings the following season, but still received a 4--1 record, and the Yankees won the 1947 World Series . He continued being a relief pitcher for part of the 1948 season before he was purchased by the Chicago White Sox . He finished the 1948 season in the starting rotation for the White Sox . He spent the 1949 season in the starting rotation as well, and managed to keep his spot throughout the year despite allowing the most home runs in the American League . It was also the one season where Gumpert pitched over 200 innings, pitching 234, and the season where he pitched the most complete games and shutouts, with 18 and 3, respectively . The 1950 season saw Randy split time between the starting rotation and the bullpen . </P> <P> On May 1, 1951, Gumpert became part of baseball history as he allowed Mickey Mantle's first home run . 1951 also saw Gumpert make his only all - star appearance, in which he did not pitch . On November 13, 1951, Gumpert was traded along with Don Lenhardt to the Boston Red Sox for Mel Hoderlein and Chuck Stobbs . After playing 10 games for the Red Sox, he was traded again, this time to the Washington Senators with Walt Masterson for Sid Hudson . </P> <P> After spending the rest of the season in Washington, both in the rotation and the bullpen, Gumpert retired . He later became a scout for the New York Yankees, managed in their farm system and served as a temporary member of the Bombers' 1957 coaching staff, when, in April, Bill Dickey stepped down due to ill health; Gumpert eventually ceded his coaching post to Charlie Keller . </P>

Who gave up mickey mantle's first home run
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