After being formed in the youth teams of FC Barcelona, in 2007, Rabaseda joined CB Cornellà, a team affiliated with Barcelona, to play in the LEB Plata league. After two years, and achieving the promotion to the LEB Oro in 2009, he left Cornellà to join FC Barcelona Bàsquet's roster. Despite only playing limited minutes in three games, he was a part of the Barcelona team that won the EuroLeague's 2009-10 season championship, at that season's Euroleague Final Four in Paris.