Peter Robb will make his Pro12 debut in Connacht's crunch top-of-the-table clash with Leinster on Saturday night (5.15pm) - but Ultan Dillane has not yet recovered from a shoulder knock picked up during on Ireland duty.
Robb, 21, is one of two changes Pat Lam has made to the team that ground out victory against Edinburgh, as he partners Bundee Aki in midfield at the Sportsground.
Niyi Adeolokun returns to the right wing after missing the Edinburgh game through injury. The half-back pairing is once again made up of AJ MacGinty and Kieran Marmion.
In the pack Ireland international Nathan White, who featured in all five Six Nations games, line up in the front row while 21-year-old Sean O'Brien is again included in the back row with Jake Heenan and captain John Muldoon.
Internationals Robbie Henshaw - who only joined team training on Thursday - and Finlay Bealham are both named amongst the replacements. Front-rower Bealham who has featured in every Connacht game this season, is in line to make his 50th appearance.
"I have a lot of respect for who Leinster are and what they have achieved," said Lam. "There is a lot of quality right across the squad and I believe Leo (Cullen), in his first season as head coach, has done a tremendous job.
"We are expecting a pretty physical and fired-up opposition. As a team who have history of winning at this stage of the season, it's going to take a massive collective effort from us to come out on top.
"There's certainly a huge buzz around this game tomorrow and we're all really looking forward to it - it doesn't get much better than playing in front of a sold-out Sportsground.
"Staying focussed and channelling that excitement and energy into our structures and systems will give us the best chance of getting the points on offer."
Connacht: Tiernan O'Halloran, Niyi Adeolokun, Bundee Aki, Peter Robb, Matt Healy, AJ MacGinty, Kieran Marmion; Denis Buckley, Tom McCartney, Nathan White, Quinn Roux , Aly Muldowney, Sean O'Brien, Jake Heenan, John Muldoon (captain)
Replacements: Dave Heffernan, Ronan Loughney, Finlay Bealham, Andrew Browne, Eoin McKeon, Caolin Blade, Shane O'Leary, Robbie Henshaw
Luke Fitzgerald will make earn his 150th Leinster appearance as he makes his return the the medial ligament injury that destroyed his Six Nations campaign.
The back picked up the injury during an open training session before the tournament when his foot became caught in the ground and he fell awkwardly.
His return is a massive boost for Leo Cullen, as he eyes what would be a huge derby triumph.
With Fergus McFadden coming on to the right wing, captain Isa Nacewa - making his 100th Pro12 appearance on Saturday - reverts to fullback with Fitzgerald taking up the number 11 jersey. Ben Te'o and Garry Ringrose continue in midfield.
Luke McGrath again starts at scrumhalf with Ian Madigan joining him in the half backs.
Cian Healy comes in at loose head prop with Richardt Strauss also starting at hooker. Tadhg Furlong completes the front row.
Behind them Ross Molony and Hayden Triggs start in the second row, while in the back row Dominic Ryan starts from blindside with Josh van der Flier and Rhys Ruddock back from Ireland duty to complete the pack.
Irish players Sean Cronin, Jack McGrath, Mike Ross, Devin Toner, Jamie Heaslip and Eoin Reddan are all included on the bench.
Leinster: Isa Nacewa (capt), Fergus McFadden, Garry Ringrose, Ben Te'o, Luke Fitzgerald, Ian Madigan, Luke McGrath; Cian Healy, Richardt Strauss, Tadhg Furlong, Ross Molony, Hayden Triggs, Dominic Ryan, Josh van der Flier, Rhys Ruddock
Replacements: Sean Cronin, Jack McGrath, Mike Ross, Devin Toner, Jamie Heaslip, Eoin Reddan, Noel Reid, Zane Kirchner
