As manager 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.

A native of Chicago, Melillo reached the majors in 1926 with the Browns, spending nine and a half years with them before moving to the Boston Red Sox (1935–37).

After spending the 1949 season as a minor league manager, he coached under Boudreau in 1950, his final year with the Indians, then again with the Red Sox (1952–53) and Kansas City Athletics (1955–56).

He also suffered from zoophobia, a generic term for the class of specific phobias to particular animals, including rabbits, birds and snakes.