The senior trio are joined by three academy players also moving on to senior contracts.
Munster rugby have confirmed that Billy Holland, Stephen Archer and Kevin O’Byrne have all signed two year contract extensions with the side.
Joining them in signing new deals with the Province are Greencore academy graduates Liam O’Connor, Finnen Wycherley and Calvin Nash who have each signed extensions on their current deal.
Holland, who up until the Connacht game had featured in every Munster game this season, has agreed a two year extension that will keep him in Ireland until June 2020.
Similar to the 176 time capped second row, Archer and O’Byrne will be at the province until June 2020 too.
Archer is now the only member of the squad that has featured in every single game for Munster this year and like Holland is one of the more senior players in the squad with the 30-year-old making his 151st appearance in red against Connacht in Thomond Park last Saturday.
O’Byrne, a hooker by trade, made his European debut this season in the home win over Racing in October and went on to impress when he started against Leicester in Welford road in Round 4.
Academy prop Liam O’Connor, who is currently rehabbing a long-term knee injury sustained against Ospreys, will advance to a two-year senior contract at the start of the 2018/19 season. O’Connor made his European debut back in January 2016 in a home win over Stade Francais and has since impressed at loosehead prop starting 11 of the first 12 games this season before that injury against the Welsh side.
Also moving up from the academy is Young Munster second row Fineen Wycherley who has signed a one year development deal. From Bantry in West Cork, the 20-year-old lock has made six appearances in the Guinness PRO14.
Calvin Nash, also from the cookies, has signed a one year development deal from the start of next season and will hope to add to his four Guinness Pro 14 appearances he already has.
Continuing on the academy front, the South African duo of Keynon Knox and Matt More, both 18, recently linked up with Peter Malone’s charges after completing their schools rugby with Michaelhouse and St Andrew’s College respectively. Knox, a tighthead prop, and Moore who plays centre and fullback, are training with the first year academy recruits.