Hugo Keenan will make his 50th appearance for Leinster when they face Gloucester at Kingsholm in Saturday's Heineken Champions Cup tie (kick-off 1pm).Keenan continues at full-back with Garry Ringrose restored as captain on his return to the starting line-up, while Cian Healy is poised to make his 100th European appearance after being named on the bench.Ringrose is partnered by the in-form Jamie Osborne in midfield with Jamison Gibson-Park and Ross Byrne the half-back combination.Jordan Larmour and Jimmy O’Brien are retained on the wings as James Lowe is not included in the match-day 23.Ireland internationals Andrew Porter, James Ryan, Ryan Baird, Josh van der Flier and Caelan Doris come into the pack, while Michael Milne, Brian Deeny and Liam Turner could all make their European debuts from the bench.Leinster: Hugo Keenan; Jordan Larmour, Garry Ringrose (capt), Jamie Osborne, Jimmy O’Brien; Ross Byrne, Jamison Gibson-Park; Andrew Porter, Dan Sheehan, Michael Ala’alatoa; Ross Molony, James Ryan; Ryan Baird, Josh van der Flier, Caelan Doris.Replacements: Rónan Kelleher, Michael Milne, Cian Healy, Brian Deeny, Jack Conan, Nick McCarthy, Harry Byrne, Liam Turner.Munster have made nine changes to their side for the visit of Northampton Saints on Saturday (kick-off 3.15pm, live on RTÉ2 and RTÉ Player), but the omission of Conor Murray from their squad is the main talking point of Graham Rowntree's match-day squad.The 100-cap Ireland international has been left out of the match-day 23, with Craig Casey returning to the starting side and Paddy Patterson included on the bench.Casey joins Joey Carbery in the half-backs while Jack Crowley is also included, named at first centre alongside Antoine Frisch.Shane Daly swaps from the