Barcelona signed Mexican international 15 out clause.

A midfielder or defender, Dos Santos is the brother of Giovani Dos Santos from Tottenham. The younger Dos Santos, Jonathan, has been a regular with Barca's B team, and has also made a few appearances with the senior side.

Barcelona, which defeated AC Milan in the Champions League on Wednesday, plays Getafe in La Liga on Saturday. Barca is second in the table behind rival Real Madrid and leads its Champions League group.