Career
He has previously played for,, Alloa Athletic, Ayr United,, Street Johnstone, Greenock Morton, Dumbarton, Arbroath and the now extinct Airdrie. McManus made his début for Morton in a 6-3 victory over Stranraer in the League Cup. After the sacking of Davie Irons, McManus was made caretaker manager of Greenock Morton alongside James Grady.
They were appointed permanently, with McManus as the assistant manager. on 31 October 2009.
McManus and Grady were sacked on 9 May 2010, after narrowly avoiding relegation from the First Division. McManus was then offered a chance to take up playing again with Dumbarton, and agreed to sign for the 2010-2011 season.
McManus joined third division leaders Arbroath on a one-month emergency loan on 18 February 2011, but then retired from playing at the end of the season.