Oscar Donald "Ski" Melillo (August 4, 1899 – November 14, 1963) was an American second baseman and coach in Major League Baseball. He briefly served as manager of the St. Louis Browns in 1938 and was also a member of the coaching staff for the Cleveland Indians' 1948 World Series championship team. In a 12-season career, Melillo was a .260 hitter (1,316-for-5,063) with 22 home runs and 548 RBI in 1,377 games, including 590 runs, 210 doubles, 64 triples, and 69 stolen bases.