William Gordon Bonham (born October 1, 1948) is a retired former pitcher for the Chicago Cubs (1971–77) and Cincinnati Reds (1978–80). He played for the UCLA Bruins and was a member of the 1969 College World Series team with Chris Chambliss. He helped the Reds win the 1979 National League Western Division. Bonham led the National League in losses (22) in 1974. On July 31, 1974, Bonham tied a Major League record (shared by 49 pitchers) by striking out four batters in an inning (2nd). He also led the National League in earned runs allowed (120) in 1975.