Walter Cleveland "Lefty" Stewart (September 23, 1900 in Sparta, Tennessee – September 26, 1974 in Knoxville, Tennessee) was a professional baseball pitcher. He played all or part of ten seasons in Major League Baseball between 1921 and 1935. He played for the Detroit Tigers, St. Louis Browns, Washington Senators, and Cleveland Indians. Stewart gave up one of Babe Ruth's record-setting 60 home runs during the 1927 season.