He made his first-team debut against Newcastle United on 18 March 1975 and played a total of six league matches that season.
However, he could not fully break into the Arsenal first team, making only 19 appearances for the club in three seasons, scoring two goals.
Rostron, by this time Watford's captain, was sent off in a league fixture against Luton Town preceding the final and incurred a suspension.
His spell at Hillsborough lasted only 8 months, and he was loaned to the Owls' rivals Sheffield United in September 1989, a move which was made permanent in November of that year.
One of his goals was in the 5-2 victory at Leicester on 5th May 1990, which helped the Blades seal promotion to the top division as Wednesday got relegated on the same day.