He played at club level for St Helens, Barrow, Warrington, Wigan and Oldham RLFC, as a wing, centre, stand-off, or scrum-half.
[1][2] Alan Whittle was a unused substitute in St. Helens' 16-13 victory over Leeds in the 1972 Challenge Cup Final during the 1971–72 season at Wembley Stadium, London on Saturday 13 May 1972, played at centre 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 stand-off 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.
Alan Whittle played at centre in St. Helens' 2-2 draw with Warrington in the 1967 Lancashire Cup Final during the 1967–68 season at Station Road, Swinton on Saturday 7 October 1967 (he was replaced by Billy Benyon in the replay), played scrum-half in the 30-2 victory over Oldham in the 1968 Lancashire Cup Final during the 1968–69 season at Central Park, Wigan on Friday 25 October 1968, and played scrum-half in the 4-7 defeat by Leigh in the 1970 Lancashire Cup Final during the 1970–71 season at Station Road, Swinton on Saturday 28 November 1970.
Alan Whittle played stand-off in Warrington's 27-16 victory over Rochdale Hornets in the 1973–74 Player's No.6 Trophy Final during the 1973–74 season at Central Park, Wigan on Saturday 9 February 1974.
Alan Whittle played stand-off in Warrington's 4-0 victory over Featherstone Rovers in the 1973–74 Captain Morgan Trophy Final during the 1973–74 season at The Willows, Salford on Saturday 26 January 1974, in front of a crowd of 5,259.