Russ Pennell will be Arizona's interim coach, the school is expected to announce Friday afternoon.
According to a source, the decision to go with Pennell came after associate head coach Mike Dunlap's request (formal or otherwise) to be Lute Olson's permanent successor was not granted. Pennell, 47, joined the Arizona staff in May. Last season, he was the radio analyst for Arizona State, where he had previously been an assistant under Rob Evans.
Arizona will conduct a national search to find a permanent replacement.
Among the names sure to surface are Gonzaga's Mark Few and Pitt's Jamie Dixon.