On opening day of the 1940 season, Hemsley caught Feller's no-hitter, becoming the only catcher to catch an opening day no-hit game. He also drove in the only run of the game with a triple. His consistency in the 1940 season saw him lead the American League catchers with a .994 fielding percentage, and led to a couple MVP votes as well as his fourth All-Star appearance.
On the first day of the 1940 season, Hemsley caught Feller's perfect game, becoming the only catcher to catch an opening day flawless game. He also drove in the sole run of the game with a triple. His reliability throughout the 1940 season led him to top the American League catchers with a .994 fielding percentage and garnered him MVP votes as well as his fourth All-Star appearance.