Andrew Porter will make his first appearance since early January, with Leinster head coach Leo Cullen making sweeping changes to his team for Friday's BKT United Rugby Championship clash with Scarlets at Aviva Stadium (7.45pm).
The loosehead prop is one of 12 changes to his team following last week's 38-17 defeat to Glasgow Warriors, with Brian Deeny, Joshua Kenny and Jimmy O’Brien the only players to keep their place in the side.
Porter hasn't played since the URC win against Connacht in January, having missed the Champions Cup pool finale, and Ireland’s Six Nations campaign, with a calf injury.
The 30-year-old is part of a new front row, packing down alongside his Ireland international team-mates Dan Sheehan and Tadhg Furlong.
Deeny continues in the second row, where he is joined by Joe McCarthy, who replaces the injured RG Snyman.
Cullen has also gone with a fully changed back row, led by captain Caelan Doris at number 8, with Max Deegan and Josh van der Flier on the flanks.
Jamison Gibson-Park swaps in at scrum-half, with Harry Byrne preferred to Sam Prendergast at out-half this week.
In the centre, Jamie Osborne makes his first appearance for the province since October, joined by Garry Ringrose, with Robbie Henshaw on the bench and Rieko Ioane left out of the matchday 23.
Tommy O’Brien comes in for Hugo Keenan and starts on the right wing, with Joshua Kenny moving to the left side of the pitch and Jimmy O’Brien dropping into full-back.
Gus McCarthy, Jerry Cahir and Rabah Slimani provide the front row cover from the bench, with Conor O’Tighearnaigh and Alex Soroka adding to the forward reinforcements. Fintan Gunne and Prendergast are the half-backs in reserve as Henshaw completes the matchday 23.
Leinster: Jimmy O’Brien; Tommy O’Brien, Garry Ringrose, Jamie Osborne, Joshua Kenny; Harry Byrne, Jamison Gibson-Park; Andrew Porter, Dn Sheehan, Tadhg Furlong; Joe McCarthy, Brien Deeny; Max Deegan, Josh van der Flier, Caelan Doris (capt).
Replacements: Gus McCarthy, Jerry Cahir, Rabah Slimani, Conor O’Tighearnaigh, Alex Soroka, Fintan Gunne, Sam Prendergast, Robbie Henshaw.
Jack Crowley (above) and Craig Casey both make welcome returns for Munster as they look to rebound from last week's humiliating 45-0 defeat to Sharks.
The pair are among 8 changes made by head coach Clayton McMillan, while their fellow Ireland international Jeremy Loughman makes his return from a calf injury among the replacements.
Crowley’s return sees JJ Hanrahan drop back to the bench, while last week’s starting scrum-half, Ethan Coughlan, misses out on the matchday squad.
McMillan has looked to beef up his bench for the meeting with the Bulls, with a 6:2 split that includes Edwin Edogbo, Gavin Coombes and John Hodnett.
The front row is unchanged, with Michael Milne and Michael Ala’alatoa packing down either side of Diarmuid Barron, who makes his 100th Munster appearance.
Jean Kleyn continues in the second row, while Fineen Wycherley comes in to start alongside him, as Sean Edogbo drops out and Tom Ahern shifts back to blindside flanker.
Alex Kendellen swaps in for Hodnett at openside, with Brian Gleeson starting ahead of Coombes at the base of the scrum.
With Casey and Crowley back in situ in the half-backs, Dan Kelly earns a start alongside Alex Nankivell in the centre, as Tom Farrell drops out.
Calvin Nash stays on the right wing, with Séan O’Brien replacing Shane Daly on the left side, and Ben O’Connor in for Mike Haley at full-back.
Munster: Ben O’Connor; Calvin Nash, Dan Kelly, Alex Nankivell, Séan O’Brien; Jack Crowley, Craig Casey; Michael Milne, Diarmuid Barron, Michael Ala’alatoa; Jean Kleyn, Fineen Wycherley; Tom Ahern, Alex Kendellen, Brian Gleeson
Replacements: Niall Scannell, Jeremy Loughman, John Ryan, Edwin Edogbo, Gavin Coombes, Paddy Patterson, JJ Hanrahan, John Hodnett
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