Eric O'Sullivan

Eric O'Sullivan (born 30 November 1995) is an Irish rugby union player who plays loosehead prop for United Rugby Championship and European Rugby Champions Cup side Ulster and internationally for Ireland.

Born in Dublin, O'Sullivan attended Templeogue College and Trinity College, where he completed a business studies course. He played in the back row at school, and converted to the front row at Trinity.

O'Sullivan represented his native Leinster at under-17, under-18, under-19 and under-20 level, but missed out on a place in Leinster's academy. Strong performances for Dublin University in the All-Ireland League caught the attention of Ulster and, after an appearance for Ulster's 'A' side in early 2017, He joined the Ulster academy.

He made his senior debut for Ulster off the bench in their 15–13 win against Welsh side Scarlets in the opening round of the 2018–19 Pro14 on 1 September 2018, He made 26 appearances, including 16 starts, and made 251 tackles, while still an academy player, in 2018–19, and was named Young Player of the Year in the 2019 Ulster Rugby Awards. He signed his first senior contract with Ulster in February 2019. He made 18 appearances, including 10 starts, in 2019–20. He made his 50th appearance for Ulster in November 2020. He made his debut for Ireland against Scotland in the Autumn Nations Cup on 5 December 2020, replacing Cian Healy. At the end of the season he was named in the 2020–21 Pro14 Dream Team.

In the 2021–22 season, he has made 17 appearances, including 7 starts.

He married Ulster and Ireland women's rugby player Fiona Tuite in July 2026.