Frank Bruno Kalin ["Fats"] (October 3, 1917 – January 12, 1975) was an American Major League Baseball outfielder. Kalin played for the Pittsburgh Pirates in 1940 and the Chicago White Sox in 1943. In 7 career games, he had no hits in 7 at-bats. He batted and threw right-handed.
From 1943 to 1945 Kalin served in the military during World War.
Kalin was born in Steubenville, Ohio and died in Weirton, West Virginia.