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Trade Details

Date: December 11, 1959

Kansas City Athletics acquire

  • Right fielder Hank Bauer
  • Right-handed pitcher Don Larsen
  • Outfielder Norm Siebern
  • First baseman/Outfielder Marv Thorneberry


New York Yankees acquire

  • Shortstop Joe DeMaestri
  • First baseman Kent Hadley
  • Right fielder Roger Maris

RF Roger Maris

The Yankees knew Maris was good (an American League All-Star in 1959), but not this good. The Minnesota native led the AL in runs batted in during both the 1960 and 1961 seasons on his way to consecutive MVP awards. In that second year, he slugged 61 home runs to break Babe Ruth's MLB record.

Maris Hits His 60th Home Run (1961)

Initially, Maris' pursuit of Ruth was shrouded in controversy because Major League Baseball had extended its regular season schedule. He tied the record here in the Yankees' 159th game, whereas Ruth never had the opportunity to play so often in a single season.

RHP Don Larsen

New York parted with a local hero to facilitate this trade. Larsen famously pitched a perfect game for the Yankees during the 1956 World Series and started the winner-take-all Game 7 for them in both 1957 and 1958.

OF Norm Siebern

Although Siebern couldn't match Maris' power, he was durable and consistent for the A's across four seasons. He led the team with 59 HR, 298 RBI and 271 BB from 1961-1964.

Trade's Legacy

The Yankees made the move in reaction to a disappointing 1959 campaign. With Maris' help, they would win each of the next five AL pennants. His uniform number (No. 9) is now retired in Yankee Stadium's Monument Park.

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