Mack Hansen will make his first Connacht appearance of the season in tomorrow's BKT United Rugby Championship derby with Leinster at a sold-out Sportsground (7.35pm).The Ireland winger is among seven players who come into the starting XV from last weekend's 53-27 loss to the Bulls.Peter Dooley, Dave Heffernan and Jack Aungier form an all-new front row, while Cian Prendergast comes back into the side at blindside flanker.Oisin Dowling, making his 50th appearance, moves to the second row to play alongside Darragh Murray, while Seamus Hurley-Langton and number 8 Sean Jansen complete the pack.Scrum-half Caolin Blade captains the side while JJ Hanrahan is at out-half.Byron Ralston moves from the wing to outside centre where he’s partnered with Cathal Forde, while Hansen, Diarmuid Kilgallen and full-back Tiernan O’Halloran complete the back three.There’s another 6:2 split on the bench, including Paul Boyle who could feature for the first time this season, and scrum-half Michael McDonald who will make his debut if called upon.Connacht: Tiernan O'Halloran; Mack Hansen, Byron Ralston, Cathal Forde, Diarmuid Kilgallen; JJ Hanrahan, Caolin Blade; Peter Dooley, Dave Heffernan, Jack Aungier; Darragh Murray, Oisin Dowling; Cian Prendergast, Shamus Hurley-Langton, Seán Jansen.Replacements: Dylan Tierney-Martin, Denis Buckley, Finlay Bealham, Niall Murray, Paul Boyle, Michael McDonald, David Hawkshaw, Conor OliverMeanwhile, Scott Penny (above) returns to captain the Leinster team after last Saturday's 21-16 win over Munster at the Aviva Stadium.Hooker Rónan Kelleher is in line to make his 50th appearance for Leinster.After replacing the injured Ross Byrne in last week’s victory, Ciarán Frawley starts in Galway at full-back.Rob Russell