Brobbey (born in Amsterdam, February 1, 2002) joined Ajax's youth academy in 2010. On October 31, 2020, he made his first team debut during the match between Ajax – Fortuna Sittard: 5-2. In the summer of 2021, the attacker signed a contract with RB Leipzig. Prior to his departure, he played 19 times for Ajax, scoring 6 times.
In the winter break of last season, Brobbey returned to Ajax on a loan basis from RB Leipzig for six months. In that period, the striker played 13 matches, in which he scored 7 goals. As a result, Brobbey has already won the league twice with Ajax and, as an Ajax player, he also won the Dutch Cup in 2021.