KAHN Fotuali'i will lead the Ospreys when they head to RaboDirect Pro12 leaders Ulster on Friday night.
The Samoan will partner Matthew Morgan at half-back.
The likes of Ian Gough and Joe Bearman will provide experience up front for Steve Tandy's side.
Both sides will be without a number of internationals due to the Six Nations.
Ulster: R. Andrew; A. Trimble, L. Marshall, P. Wallace, M. Allen; S. Olding, R. Pienaar; C. Black, R. Herring, T. Court, J. Muller (capt), L. Stevenson, M. McComis, R. Diack, A. Birch. Reps: N. Annett, R. Lutton, A. Warwick, D. Tuohy, N. McComb, .P Marshall, D. Cave, C. Cochrane.
Ospreys: R. Fussell; T. Habberfield, T. Isaacs, J. Spratt, B. John; M. Morgan, K. Fotuali'i (capt); R. Bevington, S. Baldwin, C. Griffiths, I. Gough, J. King, M. Allen, J. Bearman, S. Lewis. Reps: M. Dwyer, D. Jones, D. Arhip, A. Wyn Jones, L. Peers, A. Ellis, R. Jones, J. Murphy.