Goalkeeper Billy Mercer started his career with hometown club Liverpool but after struggling to breakthrough to the first team he joined Rotherham United in 1989, making 138 appearances for the Millers during his five-and -a half -year stay at Millmoor.
In October 1994 he signed for local rivals Sheffield United, spending just over a year at Bramall Lane. After failing to gain a regular slot in the Blades' starting eleven, loan spells at Nottingham Forest and Chesterfield followed.
Mercer made the switch to Saltergate permanent in December 1995 and established himself as first choice between the sticks over the next four seasons, which included a run to the 1997 FA Cup Semi Final against Middlesbrough.
By the 1999/2000 season Mercer had slipped down the packing order and joined Bristol City, making 32 appearances in his first season, remaining on their books until he retired from professional football in January 2003.
Mercer was appointed as a goalkeeping coach at Ashton Gate, where he impressed and was subsequently brought to Hillsborough in summer 2004. Following Paul Sturrock's dismissal in October 2006, Mercer acted as caretaker assistant manager to Sean McAuley, before the arrival of Brian Laws and Russ Wilcox in November 2006.