Lavington has produced a seven-goal final term blitz to topple the gutsy Corowa-Rutherglen by 66 points.
The winless Roos trailed by only 24 points at three-quarter time, before falling 13.21 (99) to 5.3 (33).
“We played really well, we put a lot of pressure on them and tried to hold them up,” Roos’ coach Terry Burgess said.
“We forced them to turn the ball over and use it more than they probably had.
“We were certainly in it deep into the last quarter and not too far out of the game, it was probably just their bigger bodies and experience that got us in the end.”
The Roos had a difficult lead-up to the match with news breaking Marc Almond will take over from Burgess next year.
However, the players showed tremendous resilience to push a top three contender.
In his second game back, Adam Prior kicked five goals, while district recruit Marty Brennan again impressed in a best on ground display.