Pearson was AL ERA leader (2.33) as a rookie with the Indians in 1933. The next year he was 18-13, but after a disappointing 1935 season, he was traded to the Yankees with Steve Sundra for Johnny Allen. He bounced back with his best year, 19-7, and an AL-leading .731 percentage. In 1937 he pitched a no-hitter against his old team, the Indians. Pearson had control problems (in four seasons he walked more than 100) but he often benefited from strong batting support. He also suffered various arm and body ailments and was reluctant to pitch unless he felt in top condition. An outstanding WS pitcher, he won four well-pitched games for the 1936-39 Yankees, including a two-hit shutout of the Reds in 1939.