|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)||27||(3)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 12 May 2014.
† Appearances (Goals).
Pírez began his career on Defensor Sporting's youth categories. On 4 August 2008 he traveled to England to try out for Chelsea F.C.. He then played friendlies with the Chelsea youth squad, and had some impressive performances, which granted him a scholarship deal with the club. However, due to FIFA regulations, the player was not allowed to play in England before his eighteenth birthday. Pírez then returned to Defensor, on a loan contract.
In 2010 summer he was promoted to Defensor's first team, but due to appendicitis, he missed half of the season. On 5 February 2011, he made his professional debut, against River Plate. He replaced David Texeira in the 76th minute, and scored the last goal of the match, in the dying minutes of the match. He made his second appearance on 17 April, against Fénix. He suffered a knee injury in May.
On 9 July 2012, Pírez joined CE Sabadell FC in a loan deal until the end of August. After the trial with Sabadell, he was loaned out to CD Leganés, in a season-long deal. On 10 August 2013, Pírez extended his loan stay at CD Leganés loan for the duration of the 2013-14 season. On 23 May 2014, Chelsea released Pirez and made him available for free transfer.
|1.||11 September 2011||Estadio Nacional, Santiago||Chile||2–2||2–2||Friendly|
- "Jhon Pírez". Soccerway.
- 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; 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 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" (in English). tribalfootball.com. 10 August 2013. Retrieved 14 August 2013.
- "Clubs submit retained and released lists" (in English). premierleague.com. 23 May 2014. Retrieved 29 May 2014.
- "HUTCHISON, PIREZ RELEASED BY CHELSEA" (in English). tribalfootball.com. 24 May 2014. Retrieved 29 May 2014.