Leinster have announced 23 new player contracts, confirming three-year deals for Cian Healy and Mike McCarthy.
Ireland internationals Leo Cullen, Sean Cronin, Luke Fitzgerald, Fergus McFadden, Richardt Strauss and Devin Toner have also extended their stays with the province.
The nationally contracted trio of Healy, Rob Kearney and Mike Ross had already confirmed new contracts and the addition of Newcastle Falcons out-half Jimmy Gopperth and Ireland international second row McCarthy is a further boost.
Leinster also revealed they hope to make one more overseas player in the coming weeks.
With forward duo Healy and McCarthy having both agreed three-year deals, in all 16 players have extended their contracts by two years.
Leinster coach Joe Schmidt said: "Ahead of a few big weeks for us in both the PRO12 and the Amlin Challenge Cup, it’s great to have confirmation that so many of our current squad are staying with us, along with a few new players that will add further value to what we believe is a really competitive squad.
"The players have done a great job in recent years and they’re committed to maintaining that in the seasons to come but, in the short term, our focus will be on Ulster this weekend and London Wasps the week after.
"The players have done a great job in recent years and they’re committed to maintaining that in the seasons to come but, in the short term, our focus will be on Ulster this weekend and London Wasps the week after."
NEW LEINSTER CONTRACTS:
Three Years: Cian Healy (national contract), Michael McCarthy
Two Years: John Cooney, Sean Cronin, Luke Fitzgerald, Jimmy Gopperth, Rob Kearney (national contract), Brendan Macken, Ben Marshall, Fergus McFadden, Jack McGrath, Jordi Murphy, Eoin O’Malley, Mike Ross (national contract), Quinn Roux, Dominic Ryan, Richardt Strauss, Devin Toner
One Year: Leo Cullen, Darren Hudson, Martin Moore, Jack O’Connell, Noel Reid