Career
Brennan plays as a goalkeeper. Brennan made his debut for Kilmarnock in a 2–0 victory over Dundee United on 3 October 2014, after replacing injured Killie goalkeeper Craig Samson at half time. In July 2015, Brennan signed on loan with Scottish League One side Stranraer on a six-month deal.
He was recalled by Kilmarnock on 1 September 2015, after the club loaned fellow goalkeeper Devlin McKay to Derby County.
