 Pröpper played in every league match but one, scoring 10 goals in the 2015–16 title winning season, successfully defending their title from the year prior.Pröpper signed for newly promoted Premier League club Brighton & Hove Albion on 7 August 2017 on a four-year contract, for a club-record transfer fee.5 days later he made his debut, playing the full match in Brighton's first ever Premier League fixture.