The Ohio Cup, also known as the Battle of Ohio, is an annual interleague rivalry series between the two Major League Baseball (MLB) teams from the U.S. state of Ohio: the Cincinnati Reds of the National League (NL) and the Cleveland Guardians (formerly Indians) of the American League (AL). The series name comes from the trophy the teams play for, which was first introduced in 1989 for an annual pre-season exhibition game between the two teams, and later reintroduced in 2008. The cup is awarded to the team that wins the most games against the other in a particular season. In the event of a tie, the team holding the trophy from the previous season retains it.