New Ireland star Joe McCarthy has been taking inspiration from American football but has no plans to follow former Wales wing Louis Rees-Zammit in chasing an NFL career.

Leinster lock McCarthy has been one of the standout performers of the opening two rounds of the Guinness Six Nations and was named man of the match on his championship debut against France.

The powerful 22-year-old’s eye-catching display in a 38-17 win over Les Bleus came just over a fortnight after 23-year-old Rees-Zammit stunned rugby union by quitting to pursue a dream in the United States.

New York-born McCarthy, who tuned in with international team-mates to watch Sunday’s Super Bowl as the Kansas City Chiefs defeated the San Francisco 49ers, said: “I love the defensive side of the game, probably like it more than the attack sometimes.

“They say defence wins championships, so it is good.

“I love getting off the line, I love pressuring teams, love getting them ‘man and ball,’ getting in at rucks. I like watching the defensive players in NFL, like seeing the stuff they do.

“At the moment I like Maxx Crosby from the (Las Vegas) Raiders. I liked JJ Watt (former Houston Texans and Arizona Cardinals defensive end) when he played. He is a beat, or was, he is retired now.

“I don’t think I’ll be changing over to the NFL any time soon. I’ll stick with the rugby.”

McCarthy retained his second-row spot for Sunday afternoon’s 36-0 victory over Italy in Dublin as defending Grand Slam champions Ireland backed up their statement success in Marseille.

Following his first Test cap against Australia in the autumn of 2022, he missed last year’s Six Nations due to injury before becoming the youngest member of Andy Farrell’s World Cup squad.

McCarthy admits his elevation at international level has brought increased scrutiny.

View this post on Instagram

A post shared by Irish Rugby (@irishrugby)

“There is way more attention in the Six Nations, you can feel it, much more than club games,” he said.

“It is good, you are getting a lot of nice mentions; you’re trying to block it out and just go back to the process.

“I felt I was ready to go at that stage (in the 2023 Six Nations) but an ankle injury kept me out for a few months. That happens.

“It’s great to get an opportunity now and I am looking forward to it.”

Ireland return to action at home to Wales on February 24 before taking on England and Scotland next month.

Munster wing Calvin Nash and Leinster lock Joe McCarthy will make their Guinness Six Nations debuts in Ireland’s championship opener against France but centre Garry Ringrose misses out due to a shoulder issue.

Jack Crowley has been selected at fly-half for Friday evening’s curtain-raiser in Marseille following the retirement of former captain Johnny Sexton after the 2023 Rugby World Cup.

Andy Farrell’s starting XV, led by flanker Peter O’Mahony, shows just four changes from Ireland’s 28-24 quarter-final defeat to New Zealand on October 14, with Robbie Henshaw coming in for the sidelined Ringrose in the other alteration.

Twenty-six-year-old Nash, who won his only previous cap as a replacement in a 33-17 World Cup warm-up win over Italy last August, will line up on the right flank in place of the injured Mack Hansen.

McCarthy, 22, featured twice at the tournament in France and will partner Tadhg Beirne in the second row after being preferred to experienced duo James Ryan and Iain Henderson.

Ringrose was an option to switch positions and fill the void left by Connacht star Hansen but he has been ruled out by a bang on a shoulder.

The 29-year-old Leinster co-captain is expected to be back in contention for the round-two clash with Italy on February 11.

His absence sees Henshaw return to midfield, alongside 2023 World Rugby player of the year nominee Bundee Aki.

Munster number 10 Crowley, who has nine international caps, will make his full Six Nations debut to stake his claim as long-term successor to Sexton.

The 24-year-old’s only previous action in the championship was a three-minute cameo against Italy 12 months ago.

Ciaran Frawley, who – like Nash – won his one and only Test cap by coming on against the Azzurri last summer, will provide fly-half cover from the bench, while Harry Byrne – the younger brother of the injured Ross Byrne – must wait for his opportunity.

Title holders Ireland defeated France 32-19 in Dublin last February en route to dethroning their rivals as Grand Slam champions.

Andrew Porter, Dan Sheehan and Tadhg Furlong continue in an unchanged front row, with fellow Leinster players Josh van der Flier and Caelan Doris joining new skipper O’Mahony at the base of the pack.

Jamison Gibson-Park retains the scrum-half role ahead of Conor Murray, with James Lowe on the left wing and Hugo Keenan at full-back.

Veteran prop Cian Healy returns to the bench at Stade Velodrome after missing the World Cup with a calf injury.

The 36-year-old loosehead is joined by Ronan Kelleher, Finlay Bealham, Ryan, Ryan Baird, Jack Conan, Murray and Frawley.

Ireland team: H Keenan (Leinster); C Nash (Munster), R Henshaw (Leinster), B Aki (Connacht), J Lowe (Leinster); J Crowley (Munster), J Gibson-Park (Leinster); A Porter (Leinster), D Sheehan (Leinster), T Furlong (Leinster), J McCarthy (Leinster), T Beirne (Munster), P O’Mahony (Munster, capt), J van der Flier (Leinster), C Doris (Leinster).

Replacements: R Kelleher (Leinster), C Healy (Leinster), F Bealham (Connacht), J Ryan (Leinster), R Baird (Leinster), J Conan (Leinster), C Murray (Munster), C Frawley (Leinster).