Watts (28 December 1924 – 19 March 2006) was a Welsh postman, and professional rugby league footballer for Hull FC from 1945–1960, and also represented Cumberland from 1952–1953.
Ivor's last match for Hull FC was playing at Wembley on 14 May 1960 in the 1959–60 Challenge Cup Final against Wakefield Trinity in which Hull FC lost 5–38.
After his last match he was then appointed assistant-coach from 1960–1970.
He became head-coach from 1970–1971 after Johnny Whiteley resigned.
During the time Ivor coached Hull FC they won 28 out of 45 matches and only lost 17.