George Bernard "Dave" Koslo (né Koslowski,[1] March 31, 1920 – December 1, 1975) was a professional baseball left-handed pitcher over parts of twelve seasons (1941–1942, 1946–1955) with the New York Giants, Baltimore Orioles and Milwaukee Braves.

On April 18, 1947, Koslo gave up Jackie Robinson's first major league home run, hit in the third inning.

[2] Koslo was the National League ERA champion in 1949 with New York.

Koslo served in World War II as a member of the 13th Airborne Division of the United States Army from 1943 to 1945.

This biographical article relating to an American baseball pitcher born in the 1920s is a stub.