Ian Humphreys is having treatment for a hamstring injury
Ulster fly-half Ian Humphreys is likely to miss the Magners League game against the Dragons at Ravenhill on 18 March because of a hamstring injury.
Humphreys sustained the injury in training and was forced to sit out Friday's 23-10 win over Aironi.
Ulster medical staff expect the pivotal number 10 to be out of action for two to three weeks.
Meanwhile, Connacht back row forward Mike McComish is reported to be moving to Ulster for next season.
Winger Tommy Seymour is likely to leave Ravenhill to join Glasgow.
Ulster's match against the Dragons is a crucial one as they aim to claim a top four finish and a place in the Magners League play-offs.
Brian McLaughlin's men are currently fifth in the table, two points behind the fourth-placed Cardiff Blues.