Fredrik Hammar

IF Brommapojkarna

A holding midfielder, Hammar began his career in the academy at IF Brommapojkarna and received his maiden call into the first team squad for a Superettan match versus Åtvidabergs FF on 23 September 2017. With the match safe at 3–1, he made his senior debut as an injury time substitute for Jacob Ortmark. It proved to be Hammar's only senior appearance for the club and he departed the Grimsta IP in August 2018.

Akropolis IF

On 11 August 2018, Hammar dropped down to Division 1 to join Akropolis IF on an 18-month contract. During the remainder of the 2018 season, he made 13 appearances and scored four goals, before leaving the club in January 2019.

Brentford

On 29 January 2019, Hammar moved to England to join the B team at Championship club Brentford on an 18-month contract, with the option for a further year. He scored one of the goals in Brentford B's 4–0 2019 Middlesex Senior Cup Final victory over Harrow Borough and finished the 2018–19 season with 16 appearances and two goals. Hammar was a part of the first team squad throughout much of the 2019–20 pre-season and after a period out injured, he made his debut as a late substitute for Jan Žambůrek in a 1–0 FA Cup third round victory over Stoke City on 4 January 2020. Hammar was promoted into the first team group for the 2019–20 season restart and the club took up the one-year option on his contract in July 2020. Hammar was included in the first team group for the duration of the…

Hammar has been capped by U17 and U19 level. He was a part of Sweden's 2018 UEFA European U17 Championship squad and scored two goals in three appearances at the tournament.

As of match played 9 August 2026

Hammar grew up in Hässelby and also played floorball and ice hockey before deciding to concentrate on football. He is a Hammarby IF supporter.