Background
Ronan grew up playing Gaelic football and represented Meath Gaelic Athletic Association in the All-Minor Football Championship.
Gaelic football player rugby union player
Ronan grew up playing Gaelic football and represented Meath Gaelic Athletic Association in the All-Minor Football Championship.
He played as a Flanker. Switching from football to rugby, he played at underage level for and, and spent four seasons with
He moved to in 2007, and made his debut against Scarlets in September of that year. He signed a new two-year contract with in March 2012.
Ronan earnt his 100th cap for on 3 May 2013, coming on against Zebre in a Pro 12 fixture.
On 30 April 2014, it was announced that Ronan was retiring from rugby due to a knee injury sustained in October 2013. He earnt his second cap a week later against United States of America. He was called up to the squad for the 2010 Summer Tour as a replacement for Kevin McLaughlin and played against the Barbarians, New Zealand Māori and Australia.
Ronan also played for against Scotland in a 2011 Rugby World Cup warm-up on 6 August 2011.
He won the Senior Schools Championships in 2000 with Saint Mary"s, Drogheda. He was in the team that beat to win the 2011 Magners League Grand Final. A knee injury sustained in "s Heineken Cup Round 5 clash with Castres Olympique ruled Ronan out for the rest of the 2011-2012 season. He made his debut for against Canada on 23 May 2009, starting and finishing the match in a 25–6 win.