Colin Healy gave the visitors the lead on 35 minutes, but the Rebels had Darren Dennehy sent-off in the 65th minute.
Rovers, however, left it until injury time to level matters through Derek Foran.
Derry City, meanwhile, enjoyed a comfortable 4-0 win over Shelbourne at the Brandywell as Rory Patterson's first-half strike was doubled in the second half by an owl goal from Paul Crowley. Late goals from Michael Rafter and Mark Griffin completed the rout for the Candystripes.
Meanwhile, at the Carlisle Grounds, John Mulroy's 80th minute goal rescued a point for Bray in a 2-2 draw with UCD. The Students' David McMillan scored a brace for the visitors to cancel out Jason Byrne's fourth minute opener for Bray, but they had to settle for a point - their first of the campaign.