Brian Brobbey hails from Amsterdam, Netherlands, where he began his youth career at AFC before moving to the renowned Ajax academy in 2010. He made his senior debut with Ajax on October 31, 2020, scoring on his first appearance in a 5–2 win against Fortuna Sittard. Brobbey's skill and composure on the ball quickly gained him recognition, leading to his first European goal in the UEFA Europa League against Lille in February 2021. After a stint at RB Leipzig, he returned to Ajax on loan before re-signing permanently for €16.35 million in July 2022.
During his time at Ajax, Brobbey showcased his abilities with 22 goals in 43 appearances in the 2023-24 season, earning the title of Ajax Player of the Year. His performances attracted interest from various clubs, underscoring his potential as a striker characterized by strength and finishing ability.
On September 1, 2025, Brobbey took his career to a new level by joining Sunderland for a fee that could rise to €25 million. His current role is vital for Sunderland as he aims to establish himself in the Premier League following his impactful performances in previous seasons. With a promising start in international football, having made his senior debut for the Netherlands in 2023, Brobbey looks set to make more significant contributions on the global stage.