Completed the following sentence: He umpired 2,764 major league games in his 20-year career. He umpired in two World Series (1975 and 1981), two All-Star Games (1977 and 1987) and five National League Championship Series (
1971, 1976, 1979, 1983 and 1985). Stello was an instructor at the Al Somers Umpire School.