William Charles Swift (born October 27, 1961) is an American former professional baseball right-handed pitcher.

Swift played in Major League Baseball (MLB) for the Seattle Mariners, San Francisco Giants, and Colorado Rockies.

[1] After graduating from South Portland High School, Swift attended the University of Maine, where he played college baseball for the Maine Black Bears baseball team from 1981 to 1984,[2] making four consecutive College World Series appearances.

The Giants immediately moved Swift from the bullpen to the starting rotation, where he emerged as one of baseball’s best pitchers, leading the National League (NL) with a 2.08 earned run average (ERA) in 1992 and winning 21 games in 1993.

While the Rockies had high hopes for him, he struggled with a shoulder injury, back pains, and the psychological difficulties of the thin air of Colorado, and never again put up numbers comparable to his days with the Giants.