The win means that Marshall's game next week against East Carolina will determine the Conference USA East Division champion. The winner of that game will play in the conference title game on Dec. 7.
Marshall (8-3, 6-1 Conference USA) got on the board with a 25-yard touchdown pass from Cato to Hoskins in the second quarter. Cato and Hoskins also connected for a pair of scores -- a 15-yarder and a 32-yarder -- in the third. Cato finished with four touchdown passes on the day.
It was the Thundering Herd's fourth straight win and sixth in their past seven games.
Florida International (1-10, 1-6) managed just 262 yards of total offense. It's the seventh time this season that the Panthers have scored 10 points or fewer.