There are two changes in Matt Williams' Ulster side set to travel to Cardiff tomorrow.
Italian lock Carlo Del Fava picked up a neck injury in the opening game against Llanelli, allowing Ryan Caldwell to take up the number 4 jersey and partner new Ulster recruit Ed O'Donoghue
In the back row, Kieron Dawson drops to the bench, to be replaced by David Pollock.
ULSTER V Cardiff Blues: C Schifcofske; A Trimble, D Cave, R Dewey, T Nagusa; P Wallace, l Boss; J Fitzpatrick; R Best(Capt), B Botha, R Caldwell, E O'Donoghue, M McCullough, D Pollock, R Diack.
Replacements: N Brady, T Court, K Dawson, T Anderson, C Willis, N O'Connor, B Cunningham.