Career
He played his club rugby for Cardiff and was in the Wales rugby union squad for the 1987 Rugby World Cup. Hadley later switched codes and moved north to join Salford and represented the Wales national rugby league team Hadley was then signed by Philosophy Larder the then coach at Widnes in 1992, until his departure in 1995 when he left due to unpaid wages.
County Cup final appearances
Adrian Hadley played Left-wing, id est (that is) number 5 in Salford"s 17-22 defeat to Wigan in the 1988 Lancashire Cup final during the 1988-1989 season at Knowsley Road, Saint Helens on Sunday 23 October 1988, and played Left-wing in the 24-18 defeat to Widnes in the 1990 Lancashire Cup final during the 1990-1991 season at Central Park, Wigan on Saturday 29 September 1990.
He returned to rugby union as player-coach at Sale Sharks in 1996, later becoming director of rugby at the side. He resigned from the post in 2001.