 Reilly represented Yorkshire while at Castleford in 1968 against Cumberland and Lancashire.Reilly played , and was man of the match winning the Lance Todd Trophy in Castleford’s 11–6 victory over Salford in the 1968–69 Challenge Cup Final during the 1968–69 season at Wembley Stadium, London on Saturday 17 May 1969, in front of a crowd of 97,939, and played in the 7–2 victory over Wigan in the 1969–70 Challenge Cup Final during the 1969–70 season at Wembley Stadium, London on Saturday 9 May 1970, in front of a crowd of 95,255.He later became a Tigers Hall Of Fame Inductee.