Full back Bryn Cunningham will miss Ulster's trip to Cardiff on Friday with a shoulder injury.
It will be the first Celtic League outing of the season for first-time captain Simon Best and the 22-man squad will include fit-again David Humphreys, Wallaby Justin Harrison, Ireland Under-21 Andrew Trimble and Neil McMillan, who was sideline all last season with a cruciate ligament injury.
ULSTER SQUAD (v Cardiff):
Backs: Paddy Wallace, Tommy Bowe, Kevin Maggs, Paul Steinmetz, Andrew Trimble, David Humphreys, Kieran Campbell, Paul Marshall, James Topping, Jonny Bell.
Forwards: Justin Fitzpatrick, Paul Shields (Capt), Matt McCullough, Justin Harrison, Neil Best, Neil McMillan, Roger Wilson, Rory Best, Bryan Young, Campbell Feather, Rowan Frost.