William Sheppeard Glass (August 16, 1935 – December 5, 2021) was an American professional football player who was a defensive end for 11 seasons in the National Football League, beginning with the Detroit Lions and finishing his career as a standout with the Cleveland Browns. He played college football for the Baylor Bears and was elected to the College Football Hall of Fame in 1985. Recent research has estimated that Glass had 77.5 sacks during his 94 games with the Browns, which included 16.5 in 1965. Each are team records. Glass died on December 5, 2021, at the age of 86.