The Colonials (4-7, 2-4 Northeast Conference) had scored three straight rushing TDs to grab a 21-7 lead against preseason conference favorite Bryant (5-6, 3-3) only to have Easton bring the Bulldogs roaring back.
The junior quarterback fired a scoring pass to Jose Depadua after Robert Morris failed to convert a fake punt at its 30-yard line. Three minutes later, he did it again, sailing an 18-yarder to John Lavin for the TD to cap a two-play drive.
But Ricky Perez's PAT kick sailed wide left - only his sixth miss this season.
Easton completed 12 of 29 passes for 165 yards and set the Bryant single-season passing TD mark with 22.