The 28-year old has been in scintillating form as Costa Rica defied all expectations to reach the quarter-final's of the 2014 World Cup, captaining Los Ticos to a 3-1 victory over Uruguay, before scoring in the 1-0 upset of Italy and the 1-1 draw with Greece in the round of 16.
Despite losing on penalties to the Netherlands, with Ruiz having his spot kick saved by Tim Krul, the Costa Ricans have been drawing much interest, and it is the form of Ruiz that has seen him linked to a host of clubs this summer.
Despite impressing on the world stage, Ruiz has failed to reach similar heights during his English club career, and was outcast from Fulham in January following a less than impressive spell in West London.
His contract with Fulham expires in 2015, although, following the Cottagers relegation to the Championship, the club are willing to accept only a nominal fee for the attacking midfielder. Following this news, Football Italia has announced that Serie A new boys Palermo are at the forefront of the queue to secure Ruiz's talents, and are preparing to make an approach following Costa Rica's exit from the Brazil-based tournament.
Ruiz struggled to make an impact at Craven Cottage following a promising start to his career in West London, and by January 2014, with Fulham all but doomed to relegation, the Costa Rican signed for PSV Einhoven on a temporary deal. Since joining in 2011, Ruiz has played 68 times for the Cottagers, netting eight goals in the process - a much lower return than he displayed during any of his spells with other clubs, including the loan with PSV, with whom he scored five times in just 14 games.
Despite his talents, Fulham owner Shahid Khan is unwilling to pay his £45,000-per-week wages whilst in the Championship, and has targeted Leeds United's want-away striker Ross McCormack as the attacking focal point in the search for an immediate return to the Premier League.