Benjamin Joyce Karr (November 28, 1893 – December 8, 1968), known as Benn Karr and nicknamed Baldy Karr, was a Major League Baseball pitcher who played between 1920 and 1927 for the Boston Red Sox (1920–22) and Cleveland Indians (1925–27). Listed at 6 ft 0 in (1.83 m), 175 lb., Karr batted left-handed and threw right-handed. He was born in Mount Pleasant, Mississippi.
In a six-season career, Karr posted a 35–48 record with 180 strikeouts and a 4.60 ERA in 177 appearances, including 58 starts, 29 complete games, one shutout, five saves, and 780⅓ innings of work. He also pitched in the minors for 15 years and served in the U.S. Army during World War I.
Karr died in Memphis, Tennessee at age 75.