John Eugene Billingham is an American former professional baseball player and coach. He played in Major League Baseball as a right-handed pitcher from 1968 through 1980, most notably as a member of the Cincinnati Reds dynasty that won three National League pennants and two World Series championships between 1972 and 1977.

The Cincinnati Reds are an American professional baseball team based in Cincinnati. The Reds compete in Major League Baseball (MLB) as a member club of the National League (NL) Central Division and were a charter member of the American Association in 1881 before joining the NL in 1890.