He worked in relief in both the 1936 World Series and the 1937 Fall Classic, and was treated harshly by the victorious New York Yankees, allowing 12 hits and 12 earned runs in four total games pitched and 31⁄3 innings.

Traded to the St. Louis Cardinals in May 1941, he worked for two more pennant winners and compiled a stellar .667 winning percentage (34–17) and earned run average (2.91) as a Redbird.

He also made a brief appearance (two-thirds of an inning pitched, and no earned runs allowed) in the 1942 World Series, in which the Cardinals defeated the Yankees in five games.

Gumbert spent his final five seasons in MLB with the second division Cincinnati Reds and Pittsburgh Pirates.

[1] In his 15-season big league career, Gumbert compiled a 143–113 win–loss record, allowing 2,186 hits and 721 bases on balls in 2,156 innings pitched.