Born in Lisbon of Cape Verdean descent, Rosário started playing professionally with Sporting CP's farm team, S.C. Lourinhanense, then had a stint with the former's reserves.
[6] Rosário struggled with injuries and weight problems during his third year at the La Rosaleda Stadium,[7][8][9] and made just two appearances in the Copa del Rey in the first part of the season.
[10][11] In early 2011, Rosário and his compatriot Edinho were deemed surplus to requirements, being restricted to training with the first team.
On 30 June 2012 his contract expired and he left, signing the following month with SD Ponferradina in the second tier.
[12] He left at the end of the campaign, having failed to play any games due to several physical ailments.