Ruebel was drafted by the Pittsburgh Pirates in the 3rd round of the 1991 [Major League Baseball draft] and pitched parts of three major league seasons for the Pirates and Tampa Bay Devil Rays. Ruebel won 4 games in the majors and had one career save, coming on September 15, 1996. In the first game of a doubleheader, Ruebel threw 2 shutout innings to preserve a 4–1 Pirates victory over the Giants.