Leitrim suffered a crushing 2-16 to 14 points defeat at the hands of Offaly at Avantcard Páirc Seán Mac Diarmada.
It looked bright for the hosts who led nine points to eight at half-time, but two second-half goals helped the faithful county to victory.
The sides were inseparable after 21 minutes with the scoreboard tied at five points each as Darragh Rooney and Keith Beirne scored a brace each and Ryan O’Rourke also chipped in with a point.
Keith Beirne registered three successive points giving Terry Hyland’s men a one-point lead at the interval.
Leitrim’s hopes of defending this lead suffered a major blow in the 47th minute when Shane Quinn was dismissed.
Three minutes later Offaly opened up a four-point lead when Bernard Allen found the net.
On 57 minutes the lead was increased to six points when Cathal Mangan registered Offaly’s second goal of the day.
Two subsequent points from Leitrim’s Raymond Mulvey and Shane Moran restored a four-point deficit but this was as small as the margin got in the concluding stages.
Offaly out-scored Leitrim by six points to two thereafter and finished with half a dozen points to spare.
Offaly will see this as a major boost while Leitrim’s survival chances in division three have been dealt a major blow.