The Mexico national team player will stay in Spain's top division following his former club Mallorca's relegation from the top flight.
Dos Santos, 24, turned down several clubs, including two-time reigning MLS Cup winner Los Angeles Galaxy, to join El Tri teammate Javier Aquino and the Yellow Submarine, the club announced Tuesday. Despite Mallorca's relegation at the end of this past season, Dos Santos was one of the standout performers; the midfielder added six goals to his team's ill-fated cause in 29 La Liga appearances.
Dos Santos began his career with Barcelona, before moving on to unhappy times with Tottenham Hotspur. He also had spells with Ipswich Town, Galatasaray, and Racing Santander before joining Mallorca last summer.
He began his international career with Mexico in 2007, and has made 68 appearances with 14 goals for his country, a part of the 2009 and 2011 Gold Cup-winning sides as well as the much-hyped Olympic gold medalists at London 2012.