Daniel O'Shaughnessy

A central defender, O'Shaughnessy began his career in Finland alongside his brother Patrick at Honka and was part of the youth team which made an impressive showing at the 2008 Nike Premier Cup. Both brothers joined Veikkausliiga club HJK in early 2009. O'Shaughnessy broke into the club's reserve team the following year and made 23 appearances, scoring two goals, during the 2011 Kakkonen season. The club missed out on promotion to the Ykkönen, after a playoff semi-final defeat to BK-46.

Metz B

After trials at Premier League clubs Liverpool, Manchester United, Sunderland and Scottish Premier League club Celtic, O'Shaughnessy moved to French Ligue 2 club Metz on a 2+1⁄2-year contract in early January 2012. He made 40 appearances and scored one goal for the club's reserve team and helped the team to the 2013–14 Championnat de France amateur 2 Group C title. O'Shaughnessy departed Metz at the end of the 2013–14 season, having failed to receive a call into the first team squad.

Brentford

O'Shaughnessy joined newly promoted Championship club Brentford on trial in July 2014 and made a 30-minute cameo in a 4–0 pre-season friendly defeat to Osasuna on 29 July. On 1 August, it was announced that O'Shaughnessy had signed a two-year professional contract. He was an unused substitute during Brentford's two League Cup ties in August 2014, but instead spent the 2014–15 season in the Development Squad, for which he made 23 appearances and scored one goal. O'Shaughnessy began the 2015–16 season in the Development Squad and joined National League club Braintree Town on a one-month loan on 22 September 2015. His only appearance for the club came later that day as a half time substitute for Sam Habergham during a 2–1 win over Woking. Following another spell back with the Brentford Development Squad, O'Shaughnessy joined Danish Superliga club Midtjylland on loan until the end of the 2015–16 season in late January 2016. He made one appearance, when he replaced…

O'Shaughnessy represented Finland at all age-groups from U15 up to U21 level. He won his maiden call into the senior team for a friendly versus Estonia on 9 June 2015, but remained an unused substitute during the 2–0 defeat. O'Shaughnessy made his full international debut as a late substitute for Ville Jalasto in a 3–0 friendly defeat to Sweden in Abu Dhabi on 10 January 2016. He made his first start three days later versus Iceland and played the full 90 minutes of a 1–0 defeat. Two years after his maiden call-up to the senior team, O'Shaughnessy won his third cap as a half time substitute in a 2–1 friendly win over Jordan on 11 January 2018. He won his first competitive cap with a start in a 1–0 2020–21 UEFA Nations League B defeat to Wales on 3 September 2020. O'Shaughnessy was named in the Finland squad for Euro 2020 and was the only domestic-based player in the selection. He started in each of the Finns' three group stage matches, prior to the team's elimination. He scored his first goal for Finland in a 3–1 2022 World Cup qualifying win over Bosnia and Herzegovina on 13 November 2021.

O'Shaughnessy was born in Riihimäki on 14 September 1994, the son of a Finnish mother and an Irish father (Robert, a painter from Galway). He holds dual Finnish-Irish citizenship. His older brother Patrick is a former professional footballer.