Injured Derry trio Declan Brown, Patsy Bradley and Barry McGoldrick have been ruled out of Saturday's McKenna Cup clash against UUJ at Celtic Park.
Brown will miss the remainder of the competition after bruising a kidney in Sunday's last-gasp defeat by Tyrone.
Midfielder Bradley and half-forward McGoldrick both sustained dead legs in the Section C match at Healy Park.
Brown had been introduced as a second-half substitute by new Oak Leaf boss Brian McIver.
He spent two nights in hospital before being discharged on Tuesday.
UUJ lost by three points to Antrim in their opening fixture.