William Cecil Glenn Atkinson (born October 4, 1954) is a Canadian former professional baseball player and a former Major League Baseball (MLB) relief pitcher. The 5 ft 7 in (1.70 m), 165 lb (75 kg) (11 stone 11) right-hander was signed by the Montreal Expos as an amateur free agent on October 4, 1971, and he played for them from 1976 to 1979.