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.
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Florida head coach Dan Mullen talks about how the win over Colorado State will help prepare his team for conference play.
Blake Barnett threw two touchdown passes in the fourth quarter to Darnell Salomon as South Florida rallied from a 12-point fourth-quarter deficit to defeat Illinois 25-19 on Saturday.
Tua Tagovailoa connects with Irv Smith for a 12-yard touchdown.
Jayden Reed mishandles the punt return, but makes up for it with a 93-yard touchdown for Western Michigan.
QB David Blough finds WR Terry Wright in the corner of the end zone, giving Purdue a 7-3 lead.
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