Stephen Caffrey, who hasn't played since these sides last met, may return to Saints' squad following a groin injury.
Left-back John Frost and striker Trevor Molloy come back into the team as Saints search for a fifth win in six league games.
Midfielder Dave Mulcahy (toe) is a doubt but should be passed fit.
UCD are without banned right-back Alan Mahon with Conor Kenna set to deputize as James Lee Matthews (foot) is injured.
Striker Paul Byrne remains out with an ankle injury.