Located in Waterloo, Iowa, the Waterloo Diamonds was a baseball team that formed in 1989 and lasted until 1993. A member of the Midwest League, they were affiliated with two teams in 1989-the Baltimore Orioles and San Diego Padres and the franchise was a descendant of the Waterloo Hawks . From 1990 to 1993, they were affiliated solely with the Padres. Their stadium was Riverfront Stadium.

Year-by-year record

(from Baseball Reference)

Year Record Finish Manager Playoffs
1989 47-89 14th Jaime Moreno
1990 60-76 11th Bryan Little
1991 75-63 4th Bryan Little
1992 59-78 12th Keith Champion
1993 54-79 13th Ed Romero