Career
Communicative Disorders Saprissa
John Jairo began his career with Communicative Disorders Saprissa in 2011, scoring one goal against San Carlos on 11 September 2011. During the absence of Jairo Arrieta, Ruiz emerged as Saprissa"s top striker in December 2011. Lille OSC
In January 2012, Ruiz signed a four-year contract with French side Lille OSC, and was playing with the reserve team until he was sidelined by injuries.
In July 2012, Lille agreed a deal to send Ruiz to Belgian newly promoted Belgian Second Division team Royal Mouscron-Péruwelz on loan.
Dnipro
On 25 August 2015, Ruiz signed a three-year contract with Ukrainian club Dnipro Dnipropetrovsk. Ruiz was selected in Costa Rica"s squad for the 2011 CONCACAF U-17 Championship and he was named in the 2011 CONCACAF U-20 Championship.
He participated in the 2011 Fédération internationale de football association U-20 World Cup finals in Colombia, where he scored Costa Rica"s first goal of the tournament. Young international goals
Scores and results list Costa Rica"s goal tally first.
International goals
Scores and results list.
Costa Rica"s goal tally first.