Published Tuesday, 20 March 2012
Ulster captain Johann Muller during training at Newforge. (© Pacemaker)
Both players have missed games through injury - Cave due to a foot complaint and Muller with a calf problem picked up in training.
Ireland internationals Rory Best, Andrew Trimble and Stephen Ferris are all rested.
Simon Danielli has been ruled out and Mike McComish will also miss the game.
Jared Payne and Declan Fitzpatrick also remain sidelined.
Forwards: Callum Black, Tom Court, Adam Macklin, John Afoa, Jerry Cronin, Paddy McAllister, Andi Kyriacou, Nigel Brady, Lewis Stevenson, Dan Tuohy, Johann Muller (captain), Iain Henderson, Tim Barker, Neil McComb, Willie Faloon, Pedrie Wannenburg, Ali Birch, Chris Henry, Robbie Diack.
Backs: Paul Marshall, Ruan Pienaar, Ian Porter, Ian Humphreys, Luke Marshall, Ian Whitten, Nevin Spence, Darren Cave, Stefan Terblanche, Craig Gilroy, Conor Gaston, Chris Cochrane, Adam D'Arcy.
© UTV News