Ulster flanker Chris Henry is set to return to action in Friday’s Pro12 game against Glasgow at Kingspan Stadium.
The Ireland international has recovered from a shoulder injury which has kept him out of action since December.
Centre Sammy Arnold, who will join Munster at the end of the season, is also available again after injury.
Ian Humphreys is a major doubt however, while Peter Browne, Stuart Olding and Robbie Diack are going through the return to play concussion protocols.
Ulster went top of the table last week with a last-gasp 17-15 victory over the Dragons in Belfast.
Champions Glasgow are languishing in eighth position, with one or two matches in hand over the other teams in the competition, but Ulster Director of Rugby Les Kiss is wary of the threat they pose.
“It looks like they are well down the table but if they won their two matches in hand, with bonus points, they would be just two points behind us,” said Kiss.
“You would be a fool to take your eye off them and take them for granted.
“You know the type of offloading game they can play, which can be quite exciting and damaging.
“If we can get another win, it puts a lot of pressure on the teams under us. It’s a big game for both sides.”