Senior Debut: v Zebre, September 2014, Thomond Park

European Debut: v Benetton Treviso, November 2015, Thomond Park

School: De La Salle College, Waterford

Club: UL Bohemians

International Honours: Ireland U18 Club; Ireland U19; Ireland U20; Ireland

The Waterford man is a product of the Munster youth's system having previously captained his club side Waterpark to an U17 Munster title in 2011 and the year previous was part of the All Ireland winning Waterpark U17 side that defeated Enniscorthy in the decider.

In April 2012 he captained the Ireland U18 Club side against France and England, and then made his British and Irish Cup Munster A debut at 18 years of age against Rotherham Titans in December 2012 after featuring in the Munster U20s interprovincial series.

He featured for the Ireland U19s in 2013 before getting a call up to the U20s squad for the IRB Junior World Championship in France where he played against Fiji.  

Captained the Munster U20s for the Interprovincial series in September 2013 and was selected for the Irish U20s squad in the 2014 6 Nations, starting in 4 games and picking up the man of the match award in the opening game against Scotland, scoring 2 tries.

One of 4 players named in their second Ireland U20 JWC squad in June '14 and captained the squad when they travelled to New Zealand for the tournament, playing in 4 games.

Jack made his Munster Rugby PRO12 debut when coming off the bench for Robin Copeland after 57 minutes against Zebre in Thomond Park in September '14.

Captained the Munster 'A' squad for the 2014/15 season.

Scored his first Munster try against Cardiff Blues in February 2014, also scoring in his two subsequent appearances against Scarlets and Glasgow Warriors

Named the 2015 Greencore Munster Academy Player of the Year

Became part of the senior set-up in 2015/16, penning a three year deal that will see him advance to development status for season 2015/16 and full contract status from 2016/17.

Featured heavily in his first season as a senior player, appearing in 26 of the 28 competitive games.

Made his Ireland debut against Canada at the Aviva Stadium in the 2016 November Series.

Signed a contract extension in March 2017 that will see him remain at the province until at least June 2019.

Earned his second Ireland cap as a replacement against Japan in the Summer Tour to the USA and Japan in 2017.

Became the first Waterford player to captain Munster in the professional era away to the Cardiff Blues in February 2018.

Ended the season with 30 appearances to his name but suffered a knee ligament injury in the PRO14 semi-final loss to Leinster and is expected to follow a long-term rehabilitation programme.

Signed a two-year contract extension in December 2018, committing to the province until at least June 2021.

Returned from injury away to the Ospreys in February 2019 and made his 100th Munster appearance against Leinster in May.

Made 18 appearances in the 2019/20 season and played in 22 matches over the 2020/21 campaign, signing a two-year contract extension in February 2021.

He was the standout performer in the 2021/22 season, featuring in 23 of the 26 games and clocked up more minutes on the field than any other player (1,638).

He was named Munster Player of the Year that season and became the youngest player to reach the 150-cap landmark for the province.

Signed a two-year contract extension in December 2022 to keep him at the province until at least June 2025.

Another stellar season in 2022/23 saw O'Donoghue make 23 appearances as Munster won the URC title.

Became the youngest player to reach the 200-cap landmark for Munster away to Edinburgh in May 2024.

Made 13 appearances at the start of the 2024/25 season.