ETBU came out and took a 14-0 lead in the first quarter on a pair of touchdown runs, the first a 1-yard run by Jourdan McNeill and the second an 11 yarder by Kendall Roberson.
HSU came right back and tied the game with a pair of second quarter touchdowns. Jeremy Harris capped a 64-yard drive with a short touchdown run and the PAT run failed. HSU kicker/punter Nico Francino had been injured earlier in the game.
The Cowboys got another quick stop and then Ryan Breton hit Jessie Ramos on a 73-yard touchdown pass and then Breton hit Ramos on a two-point conversion to tie the game with 8:42 to play in the first half.
HSU then got another quick defensive stop and Harris blocked a punt to set the Cowboys up with a short field. Breton scored on a 2-yard run and Alex Bell made his first collegiate PAT attempt and HSU led 21-14 with 5:28 to play in the second quarter.
The Tigers stopped the Cowboys on the first drive of the second half and then went on a 43-yard eight play drive capped by a Roberson 2-yard touchdown run. Roberson then scored a 3-yard touchdown run with 1:47 to play in the third quarter to make it 27-21.
HSU had a couple of chances with the ball in the fourth quarter but one drive ended in a punt and the other a turnover on downs and the Tigers closed out the win with a first down late on the ground.
Roberson, the nation's second-leading rusher, had 193 on 50 carries and three touchdowns.
HSU had 289 yards in the game and Breton was 15-of-23 for 207 yards and a touchdown. ETBU had 209 yards on 64 carries and were 13-of-16 for 74 yards in the air.
The defense was led by James Place, who had 16 tackles, and Spur Hearne had 15 stops.
The Cowboys are now 8-1 on the year and 3-1 in ASC play. HSU will close the regular season with a 1 p.m. game against Louisiana College at home on Saturday.