Team News:Ulster fly half David Humphreys has been ruled out of tomorrow night's Magners Celtic League clash with Cardiff at the Arms Park after picking up an injury during trainng.
The 35-year-old sustained an adductor injury while training this week and now Paddy Wallace comes into the starting XV in his place with Kevin Maggs named on the bench.
Flanker Neil McMillan returns to the squad for the first time since fracturing a thumb in January, as does Paul Steinmetz who missed the Borders game last weekend..
Ulster are currently second in the standings, five points behind provincial rivals Leinster and six points clear of Cardiff in fourth who have two games in hand.
Kick-off at the Arms Park is 7.10pm.
Ulster: Bryn Cunningham; Tommy Bowe; Andrew Trimble; Paul Steinmetz; Andrew Maxwell; Paddy Wallace; Isaac Boss; Bryan Young; Rory Best; Simon Best (C); Justin Harrison; Ryan Caldwell; Stephen Ferris; Neil Best; Roger Wilson
Replacements: Paul Shields; Justin Fitzpatrick; Tim Barker; Neil McMillan; Kieran Campbell; Kevin Maggs; Paul McKenzie
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