Harold Dana Gregg (July 11, 1921 – May 13, 1991) was a starting pitcher in Major League Baseball who played for the Brooklyn Dodgers (1943–47), Pittsburgh Pirates (1948–50) and New York Giants (1952). Gregg batted and threw right-handed. He was born in Anaheim, California. In a nine-season career, Gregg posted a 40–48 record with 401 strikeouts and a 4.54 ERA in 827 innings pitched. He was a better than average hitting pitcher in his career, compiling a .205 batting average (54-for-263) with 26 runs, 2 home runs and 15 RBI. Gregg died in Bishop, California, at age of 69.