In an effort to put less strain on his leg, Babe Ruth plays first base as Lou Gehrig moves to right field. Gehrig commits a costly error in the outfield helping the Washington Senators beat the Yankees, 7 – 3.

On May 4, 1931 — In an effort to put less strain on his leg, Babe Ruth plays first base as Lou Gehrig moves to right field. Gehrig commits a costly error in the outfield helping the Washington Senators beat the Yankees, 7 – 3.

Source:
Baseball Reference May 4