William Gustave James Kunkel (July 7, 1936 – May 4, 1985) was an American relief pitcher in Major League Baseball (MLB) from 1961 to 1963, who went on to a career as an American League umpire from 1968 through 1984.
As a player, he was listed at 6 feet 1 inch (1.85 m) and 187 pounds (85 kg); he both threw and batted right-handed.
His son Jeff was a major league shortstop from 1984 to 1992.