On the game's final drive, as the defense was about to yield its third straight touchdown of the second half, Jones sprained a knee.
After two straight passing touchdowns by Campbell, the Tribe had taken the lead, 24-17.
But Bettis scored two straight touchdowns on runs of 3 and 49 yards.
Purdue blew open the game in the fourth quarter with three straight touchdowns.
Trailing 21-14, the Red Raiders responded with three straight touchdowns to take a 35-21 lead.
The Lions needed the boost, having surrendered two straight touchdowns after blasting out to a 21-0 lead.
Fair's attempt at a third straight touchdown ended at his 24.
However Baltimore scored 2 straight touchdowns to take the lead with 1:47 left to go in the half.
Arkansas then responded with three straight touchdowns of their own to tie the game at the end of regulation.
The Ravens then scored two straight touchdowns to take a 14-13 lead with 1:47 left in the half.
