With the SSE Airtricity League Premier Division title safely in the bag, champions Shelbourne slumped to a 2-0 defeat to lowly Cobh Ramblers at St Colman's Park on Friday night.
Ben O'Riordan opened the scoring for the hosts in the 21st minute, with Danny O'Connell adding a second 10 minutes later.
The form lines for those next behind Shels in the table held up, as second-place Galway United won 2-1 at home against Wexford, despite the dismissal of Maurice Nugent in the 52nd minute.
Stephen Walsh and David Hurley had Galway in cruise control before Jack Moylan pulled one back in the 40th minute.
Nugent's crude challenge saw him garner a second yellow card in the 52nd minute, but his team-mates held out for a win that ought to have been more straightforward.
UCD remain six points off Galway but have a promotion play-off place to look forward to after they saw off Cork City 1-0 at Belfield.
Colm Whelan scored from the penalty spot in the 40th minute in a first half that the Students dominated, and while Cork finally showed signs of life after the restart, they once again proved impotent in front of goal away from home.
Cabinteely left the Carlisle Grounds with three points and the bragging rights in their derby encounter with Bray Wanderers as Kevin Knight and Mark Byrne struck in a come-from-behind 2-1 victory, while Treaty United also booked a play-offs berth in their inaugural campaign as Kieran Hanlon cancelled out James Doona's opener in a 1-1 draw against Athlone Town.