|Full name||Jhon Alexander Pírez Araújo|
|Date of birth||20 February 1993|
|Place of birth||Montevideo, Uruguay|
|Height||1.87 m (6 ft 1 1⁄2 in)|
|2010–2011||→ Defensor (loan)||2||(1)|
|2012–2014||→ Leganés (loan)||29||(3)|
* Senior club appearances and goals counted for the domestic league only and correct as of 27 March 2015.
Born in Montevideo, Pírez joined hometown Defensor Sporting's youth categories in 2004, aged 11. On 4 August 2008 he was invited to a trial period at Chelsea F.C., and after impressing during his stay he was granted a scholarship deal with the club.
However, due to FIFA regulations, Pírez was not allowed to play in England before his eighteenth birthday. He subsequently returned to Defensor, now in a loan deal.
In 2010 summer Pírez was promoted to Defensor's first team, but due to appendicitis, missed half of the season. On 5 February 2011, he made his professional debut, against River Plate, replacing David Texeira in the 76th minute and netting a last-minute goal of a 4–1 home routing.
On 10 August 2013, Pírez extended his loan stay at CD Leganés loan with the Madrid side for another campaign, which ended in promotion, with the player appearing in 19 matches, mainly as a substitute. On 23 May 2014 he was released by Chelsea.
|1.||11 September 2011||Estadio Nacional, Santiago||Chile||2–2||2–2||Friendly|
- "Los violetas están tranquilos porque siguen teniendo joyitas" [The violetas are relaxed because they keep having little pearls] (in Spanish). Ovación. 12 February 2011. Retrieved 4 October 2010.
- Introducing the new Academy scholars; CFCnet, 16 July 2009
- The Loan Report: February 1-6; TheChels.net, 6 February 2011
- DEFENSOR SPORTING VS. RIVER PLATE 4 - 1; Global Sports Media, 5 February 2011
- FÉNIX VS. DEFENSOR SPORTING 0 - 1; Global Sports Media, 17 April 2011
- Defensor Sp.: Pirez operado de tendón rotuliano (Defensor Sp.: Pírez operated from a knee tendon); Tenfieldigital.com, 25 May 2011 (Spanish)
- Jhon Pírez hará la pretemporada con el CE Sabadell (Jhon Pírez will make the preseason with CE Sabadell); Sabadell's official website, 9 July 2012 (Spanish)
- «Es decisión del entrenador, pero mi ilusión es debutar el domingo» ("It is manager's decision, but my dream is debuting in Sunday"); La Voz de Avilés, 5 September 2012 (Spanish)
- "LEGANES RETURN FOR CHELSEA STRIKER JHON PIREZ". tribalfootball.com. 10 August 2013. Retrieved 14 August 2013.
- "Clubs submit retained and released lists". premierleague.com. 23 May 2014. Retrieved 29 May 2014.
- "HUTCHISON, PIREZ RELEASED BY CHELSEA". tribalfootball.com. 24 May 2014. Retrieved 29 May 2014.
- "Jhon Pírez, nuevo jugador del Getafe B" [Jhon Pírez, new player of Getafe B] (in Spanish). Vavel. 16 July 2014. Retrieved 4 October 2014.