Evander Holyfield vs. Seamus McDonagh was a professional boxing match contested on June 1, 1990 for the WBC continental Americas heavyweight title.

[1] The fight was scheduled for June 18, but Tyson would first have to get past James "Buster" Douglas, whom he was to face in Tokyo on February 11.

Holyfield would make the trip to Japan see his would-be opponent up close, but in a shocking upset Douglas would defeat Tyson by 10th-round knockout, effectively cancelling the planned Tyson–Holyfield bout.

[2] Tyson and promoter Don King pushed for an immediate rematch,[3] but Douglas refused and instead chose to face Holyfield.

McDonagh would get back up at the referee's count of nine, but as he was clearly hurt, Joe Cortez stopped the fight, giving Holyfield the TKO victory.