Claude William Passeau (April 9, 1909 – August 30, 2003) was an American starting pitcher in Major League Baseball.

Passeau was considered the finest college quarterback in Mississippi, but he chose to pursue an athletic career in professional baseball rather than football after graduation.

Passeau started his career with the Pittsburgh Pirates, then played for several years with the Philadelphia Phillies at their notorious "bandbox" ballpark, Baker Bowl, before being traded to the Chicago Cubs, where he had several winning seasons.

Passeau's greatest individual performance came in Game 3 of the 1945 World Series, in which he pitched a one-hitter against the Detroit Tigers.

Passeau's injury proved to be costly as the Cubs were without a well rested pitcher to face Hal Newhouser in the final game.