Who was the last pitcher to start and win both games of a doubleheader?

The last pitcher to start and win both games of a doubleheader was St. Louis Cardinals pitcher Herman “Hi” Bell. On July 19, 1924, he beat the Boston Braves twice, by scores of 6-1 and 2-1. In the first game, Bell took a no-hitter into the eighth inning, and in the second game, he no-hit the Braves until the fifth. He ended up allowing just six hits over the two games. Surprisingly, Bell only won one other game that season.