Preston born Andy Lonergan joined his hometown club at the age of 16, working his way up to the first team where he made his debut under manager David Moyes in a cup tie away at Coventry City. He then went on to spend time out on loan at Darlington, Blackpool, Wycombe Wanderers and Swindon Town before establishing himself as first choice at Preston North End in 2007.
Lonergan moved to Leeds United in 2011 to replace Kasper Schmeichel. He went on to make 35 appearances in his one and only season at Elland Road before coming to join Owen Coyle's Bolton side in the summer of 2012 for £400,000 where he provided competition for first choice goalkeeper Adam Bogdan. Lonergan made just nine appearances for the club in 2012-2013, of which five came in the league and four in cup competitions.
Lonergan was much busier in 2013-2014 under manager Dougie Freedman. Although Adam Bogdan was still nominally first choice (Amidst heavy debate), the Hungarian had some injury problems. This lead to Lonergan making 21 appearances for the Mighty Bolton Wanderers, 17 in the league. It was a strong season for the veteran keeper. And Bogdan is still struggling with some injury issues, so it looks like Lonergan will begin the 2014-2015 season as the Trotters' number 1 keeper.
He is eligible to play for both England and the Republic of Ireland, though to date has yet to receive a call-up for either nation. He admitted in May 2010 that he would welcome a call-up from Ireland manager Giovanni Trappatoni.