Fulse kick-started the Seahawks (3-6, 1-4 Northeast Conference), who had lost three straight, with a 65-yard touchdown run on their first possession.
James Cooper added field goals of 36 and 39 yards in the first quarter, the first one set up by a fumble forced by Cameron Gill that Maurice Diawara recovered on the Colonials' 27. Massei connected with John Williams for a 47-yard score a minute before halftime and with Chris Woodward for 23 yards in the third quarter.
Allaah Sessions had 2 1/2 sacks for the Seahawks, who finished with six and held Robert Morris to 210 yards of offense and two turnovers.
Marthew Barr hit Dalton Elliott for a 1-yard TD late in the game for the Colonials (2-7, 0-4), who have lost six straight.
More AP college football: http://collegefootball.ap.org and http://www.twitter.com/AP-Top25
Tua & Murray's stats are astounding
Brad Edwards gives an analytical breakdown for the historic seasons put up by two Heisman finalists: Tua Tagovailoa and Kyler Murray.
Kansas' Pooka Williams arrested on suspicion of domestic battery
Kansas running back Pooka Williams, the Big 12 Offensive Freshman of the Year, has been arrested on suspicion of domestic battery.
Tebow says Murray has 'a slight lead' over Tua
Tim Tebow joins First Take to discuss his pick for the Heisman Trophy, putting Kyler Murray over Tua Tagovailoa.
Liberty hires Freeze despite off-field issues
Trevor Matich is interested in seeing how Hugh Freeze will perform as head coach at Liberty.
Wingo on SEC Commissioner: Who is going to schedule UCF?
Golic & Wingo react to SEC Commissioner Greg Sankey's comments on UCF, even when schedules are made five years ahead of time.
Former Ole Miss coach Hugh Freeze agrees to deal with Liberty
Former Ole Miss coach Hugh Freeze was introduced Friday as Liberty's new football coach. Freeze, who resigned from Ole Miss in July 2017, replaces Turner Gill.