Clarence Reginald Jenkins (January 10, 1898 – December 6, 1968), nicknamed "Fats", was an American professional baseball and basketball player from about 1920 to 1940.

Primarily he played left field in baseball's Negro leagues, and point guard for the barnstorming New York Renaissance on the hardwood, where he was also team captain.

He was inducted into the Naismith Memorial Basketball Hall of Fame as part of the Class of 2021.

Next he played for the top team of the early 1920s, Cum Posey's Loendi Big Five based in Pittsburgh, and for the New York Renaissance, the last of the Colored World Champions in 1925.

The all-black Crusaders were said to be "sidestepped" from the Chicago World's Pro Tourney that spring,[1] perhaps because Jenkins and Wright had abruptly left the team in a huff over giving sparkplug Agis Bray sufficient playing time,[2] Meanwhile, Jenkins played Negro league baseball more than twenty seasons with numerous teams based in New York, New Jersey, Pennsylvania, and Maryland; he may be most often associated with the New York Black Yankees, although he managed Brooklyn in 1940.