Early career Brobbey began his youth career with
AFC before joining the
Ajax academy in 2010.
Ajax Brobbey made his
Ajax debut in the
Eredivisie on 31 October 2020, coming on as a substitute and scoring in a 5–2 victory over
Fortuna Sittard. He made his
European debut in the group stage of the
UEFA Champions League against
Atalanta on 9 December 2020 and his performance was praised by coach
Erik ten Hag. On 3 February 2021, Ajax
director of football Marc Overmars confirmed that Brobbey would leave the club at the expiry of his contract at the end of the
season. Brobbey scored his first goal in a European competition on 18 February, netting Ajax's second goal in their
Europa League round of 32 first leg away win over
Lille.
RB Leipzig On 12 March 2021,
RB Leipzig announced the signing of Brobbey. He joined them on 1 July 2021. He was assigned shirt number 18, previously worn that season by
Jurgen Ekkelenkamp. He made his first appearance on 16 January 2022 in an away match against
FC Utrecht as the starting striker, securing two goals before being substituted off in the 70th minute for
Davy Klaassen in a 3–0 victory.
Return to Ajax On 22 July 2022, Ajax confirmed the re-signing of Brian Brobbey on a five-year contract for a fee of €16.35 million plus €3 million in potential add ons. He made his competitive return debut on the first matchday of the
2022–23 season, also scoring his first return goal for Ajax in a 3–2 away win over
Fortuna Sittard on 6 August. On 16 and 22 October 2022, Brobbey scored back-to-back
braces, leading his team to a 7–1 victory over
Excelsior and a 4–1 win over
RKC Waalwijk, respectively. Brobbey scored 14 goals in 44 appearances in all competitions during the season, as he was in and out of the starting lineup under first head coach
Alfred Schreuder, and since interim coach
John Heitinga. In the
following season, Brobbey began as a starter in attack under newly appointed manager
Maurice Steijn. Despite Ajax enduring a difficult campaign overall, Brobbey enjoyed a strong individual season, finishing as the club's top scorer with 22 goals in 43 appearances across all competitions. and his performances throughout the season led to him being named
Ajax Player of the Year. His prolific form reportedly attracted significant interest from clubs abroad, including
Arsenal, during the subsequent transfer window. Brobbey remained at Ajax and continued as the main striker for the
2024–25 season under new manager
Francesco Farioli. While Farioli noted in March 2025 that Brobbey's league goal tally was initially lower than expected, he praised the striker's progression and importance to the team. Brobbey contributed goals in both the Eredivisie and the
UEFA Europa League campaign,
Sunderland On 1 September 2025, Brobbey joined
Sunderland for a fee of €20m, which could potentially rise to €25m. He scored his first goal for Sunderland on 8 November 2025, netting the injury-time equaliser in a 2–2 draw against
Arsenal. ==International career==