He also played non-league football for Dulwich Hamlet, Dagenham & Redbridge, Droylsden and Ashton United.
His only appearances in the 1992–93 season against Cosenza and Pisa in the Anglo-Italian Cup in December 1992 as manager Billy Bonds preferred experience to youth in a successful bid to get West Ham promoted again.
Unable to break into the first-team, Rush joined Cambridge United on loan in March 1993 until the end of the season, where he made ten appearances.
He was recalled to West Ham in March and started the final nine games of the season, scoring in the first against Ipswich Town with a strike from 25 yards.
At the end of the season, manager Harry Redknapp was willing to release Rush and he joined Norwich City in August 1995.
He made 30 league and cup appearances for Oldham until he sustained cruciate ligament injuries in a match against Carlisle United in April 1998 and he was forced to retire from professional football at the age of 27.