JSU outrushed FIU 285-72 despite Zerrick Cooper leaving the game because of an injury after one carry. Josh Samuel carried 25 times for 163 yards and a touchdown, and Uriah West had 24 carries for 116 yards. Karajic made his first three field goal attempts before getting his fourth attempt blocked, snapping a string of seven makes.
JSU coach John Grass returned, in the Gamecocks' season finale, after missing last week's win over North Alabama due to testing positive for COVID-19.
FIU (0-3), which plays in Conference USA, was held to 156 total yards and six first downs.