**Alun Wyn Jones will make his 250th Ospreys appearance in the Welsh derby with Cardiff at the Arms Park.** The British & Irish Lion and Wales international - the world's most-capped Test player with 162 - features for the first time since returning during the Guinness Six Nations following shoulder surgery. The Ospreys will be looking to cut the gap on the Scarlets in the Welsh Shield and head into the weekend eight points adrift but with a game in hand. Aled Summerhill and Corey Domachowski are sidelined for Cardiff, for whom Josh Navidi remains as captain. James Ratti, Theo Cabango, Rey Lee-Lo, Rhys Carre and Dmitri Arhip come into the starting XV.
