|Full name||Oscar Krusnell|
|Date of birth||17 February 1999|
|Place of birth||Stockholm, Sweden|
|2019||→ IK Frej (loan)||3||(0)|
|2019||→ Team TG FF (loan)||12||(2)|
|2020||→ IK Frej (loan)||26||(1)|
* Senior club appearances and goals counted for the domestic league only and correct as of 28 December 2020|
‡ National team caps and goals correct as of 27 March 2018
In 2013, at age 14, he joined the youth system of Allsvenskan club AIK. He quickly moved up the ranks and represented the sides U17s, U19s and U21s during the following years. He made his senior debut for AIK in a pre-season friendly ahead of the 2015 Allsvenskan season.
In July 2015, Krusnell signed a three year-deal with Sunderland in Premier League. At age 16, he became the first youth academy player to ever get transferred abroad from AIK. Krusnell joined the club at the same time as fellow countryman Joel Asoro, a forward from Brommapojkarna.
At Sunderland, he settled as a frequent starter in the academy squad. He soon also signed a new youth contract with the club, lasting until June 2019.
During the 2016–17 season, Krusnell featured regularly in the Sunderland U18s, making 22 competitive appearances. Getting known as a well built and versatile player with good feet, Krusnell rotated between several positions, playing either left or centre back as well as making appearances on the left side of midfield.
On 10 August 2017, Krusnell transferred to Hammarby IF, thus returning to his native country at age 18. Krusnell signed a three year-contract, his first professional deal, with Hammarby and left Sunderland without making any senior appearances. Reports suggested that he moved on a free. Krusnell made his competitive debut on 21 August, coming on as a late sub, in a 3–0 away win against Örebro SK.
Oscar Krusnell played 23 games for the Swedish national U17 team. He made his debut against Finland on 19 August 2014, in a 1–1 draw. Krusnell scored his only goal for the side in a 3–0 win against Norway in a friendly on 18 September 2014. He was called up to the 2016 UEFA European Under-17 Championship in Azerbaijan, but had to withdraw from the squad due to an injury.
- "Oscar Krusnell". Soccerway. Retrieved 2017-08-10.
- "Oscar Krusnell till Hammarby". Hammarby Fotboll. Retrieved 2017-08-10.
- "Landslagsdatabasen: Oscar Krusnell". SvFF. Retrieved 2017-08-10.
- "Sunderland värvar AIK-talang". Aftonbladet. Retrieved 2017-08-10.
- "Officiellt: Sunderland värvar Oscar Krusnell från AIK". Fotbolltransfers.com. Retrieved 2017-08-10.
- "Oscar Krusnell". A.F.C. Sunderland. Retrieved 2017-08-10.
- "The Beginning: Krusnell on fulfilling a dream". A.F.C. Sunderland. Retrieved 2017-08-10.
- "'You get some crap if you're cocky here'; Youngster lifts the lid on life at Sunderland's academy". Roker Report. Retrieved 2017-08-10.
- "PÅ FD: Bajens klipp – bara 4 miljoner för tre jättetalanger". Fotbolldirekt. 12 August 2017. Retrieved 30 August 2017.
- "Tigerrandig utklassningsseger i Örebro". Hammarby Fotboll. 21 August 2017. Retrieved 22 August 2017.
- "Hammarby-talang klar för TTG!" (in Swedish). Team TG FF. 13 August 2019. Retrieved 4 January 2020.
- "1–1 i första landskampen" (in Swedish). Svenskfotboll. Retrieved 11 August 2017.
- "3–0 mot Norge i Kungälv" (in Swedish). Svenskfotboll. Retrieved 11 August 2017.
- "Isak och Haksabanovic lämnar återbud till EM" (in Swedish). Svenskfotboll. Retrieved 11 August 2017.
- "Blixtrande anfallsspel bakom storseger" (in Swedish). Svenskfotboll. Retrieved 11 August 2017.