Ulysses John "Tony" Lupien Jr. (April 23, 1917 – July 9, 2004) was an American first baseman in Major League Baseball (MLB).

He was the Eastern Intercollegiate League batting champion in 1938 and 1939, and he also was a quarterback for his freshman football team.

He was traded to the Phillies where he played in 1944 and early in 1945, before serving in the U.S. Navy during World War II.

In the 1944 season, he hit .283 with five homers, 52 RBI, 82 runs, 23 doubles, 9 triples and 18 stolen bases.

Excellent defensively, he recorded a .993 fielding percentage with only 45 errors in 6077 total chances in 602 games covering 5338 innings.

He concluded his professional career from 1951 to 1953 and in 1955 when he was a player as well as field and general manager with the Jamestown Falcons and Corning Independents, in the PONY League.

In 1980 he collaborated with writer Lee Lowenfish to author The Imperfect Diamond, a book that remains a definitive text on baseball labor from the introduction of the reserve clause in 1879 to the litigation in the 1970s that led to free agency.