Daniel O'Shaughnessy

Club career 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 -year contract in early January 2012. O'Shaughnessy departed Metz at the end of the 2013–14 season, having failed to receive a call into the first team squad. On 1 August, it was announced that O'Shaughnessy had signed a two-year professional contract.

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 Kian Hansen after 59 minutes of a 4–1 victory over Nordsjælland on the final day of the season.

Cheltenham Town On 12 July 2016, O'Shaughnessy signed a one-year contract with League Two newcomers Cheltenham Town. During a 2016–17 season in which the Robins narrowly avoided being relegated straight back into non-League football, he made 36 appearances and scored four goals. but he was down the defensive pecking order during the first half of the 2017–18 season and he departed the club on 2 January 2018. O'Shaughnessy made 49 appearances and scored four goals during 18 months at Whaddon Road.

HJK On 2 January 2018, O'Shaughnessy returned to Finland to re-join reigning Veikkausliiga champions HJK on a two-year contract, with the option of a further year. Despite missing the final three months of the 2018 season with a knee injury, O'Shaughnessy made 24 appearances, scored three goals and in his absence, O'Shaughnessy was a near ever-present during the 2019 season and finished the campaign with 31 appearances and three goals. 2021 was O'Shaughnessy's final season at the Bolt Arena and he ended what would be his first spell with the club on 118 appearances and 9 goals. He finished a mid-table 2021–22 season with 15 appearances and one goal, before suffering a fractured fibula on international duty in June 2022. O'Shaughnessy returned to fitness in mid-November 2022, but he failed to make an appearance prior to undergoing season-ending surgery on a hip problem in March 2023.

O'Shaughnessy undertook his rehabilitation in Finland and returned to continue it with the club in October 2023. On 14 March 2024, it was reported that O'Shaughnessy's professional career was in jeopardy due to consecutive injuries and two hip surgeries, but one month later it was reported that he had returned to training. O'Shaughnessy failed to win a call into a matchday squad before the end of the 2023–24 season and was released when his contract expired.

Return to HJK

On 1 July 2024, O'Shaughnessy returned to his former club HJK and signed a contract until the end of the 2025 season on a free transfer. O'Shaughnessy suffered a collarbone injury in training in July, but eventually on 18 August, he made his first competitive club appearance in over two years, as a starter for HJK in a 3–0 away win over Ekenäs IF (EIF). During the next pre-season, on 15 January 2025, his contract was extended until the end of 2026. O'Shaughnessy assumed the HJK captaincy for the 2025 season, having acted in the same role previously in 2021. On 25 April 2026, O'Shaughnessy announced his retirement from his professional career.

International career O'Shaughnessy represented Finland at all age-groups from U15 up to U21 level. He made his first start three days later versus Iceland and played the full 90 minutes of a 1–0 defeat. He started in each of the Finns' three group stage matches, He scored his first goal for Finland in a 3–1 2022 World Cup qualifying win over Bosnia and Herzegovina on 13 November 2021. Championship

Braintree Town (loan) 2015–16 League Two

2017–18 League Two 10 0 0 0 1 0

2 Veikkausliiga 17 2 5 1

2 0

24 3 2019 1 2 0 31 3 2020 0

35 1

81 5 16 3

19 1 2 0 118 9

2021–22

Metz B Championnat de France Amateur 2 Group C: 2013–14 Finnish Cup: 2020, 2025 Individual Veikkausliiga Defender of the Year: 2020, 2021 Veikkausliiga Team of the Year: 2020, 2021