 Mike Nicholas played left-, i.e.number 11, in Warrington's 24-9 victory over Featherstone Rovers in the 1974 Challenge Cup Final during the 1973–74 season at Wembley Stadium, London on Saturday 11 May 1974, in front of a crowd of 77,400, and played as an interchange/substitute, i.e.number 15, (replacing Right- Thomas Martyn) in the 7-14 defeat by Widnes in the 1975 Challenge Cup Final during the 1974–75 season at Wembley Stadium, London on Saturday 10 May 1975, in front of a crowd of 85,998.