|Full name||Galileo Galilei Percovich Lopes|
|Place of birth||Montevideo, Uruguay|
|Middlesbrough (first team coach)|
|1987–1993||Club Nacional de Football|
|1994||Clube Atlético Mineiro|
|2001||Racing de Ferrol|
|* Senior club appearances and goals counted for the domestic league only|
Percovich played for Nacional, notably winning the Copa Libertadores and Uruguayan First Division. He went on to play for Atlético Mineiro, Guaraní FC, Fluminense FC, Alianza Lima and Racing de Ferrol.
He appeared six times for the Uruguayan national team.
He joined the Colorado Rapids coaching staff in 2006, as their new goalkeeper coach, serving for two seasons before joining Chivas USA prior to the commence of the 2008 season. He moved to Toronto in December 2009, as an assistant coach following the departure of Preki during the off-season. In January 2011, Percovich continued coaching in the United States, joining Chicago Fire as assistant coach. In November 2013, it was announced he would not be returning for the 2014 season.
In November 2013, Percovich was appointed as a member of Aitor Karanka's coaching staff at Championship club Middlesbrough, being appointed as their new goalkeeping coach. He was part of the club staff that secured promotion to the Premier League at the end of the 2015–16 season. Percovich continued on as goalkeeping coach for the entirety of the 2016–17 season, despite Karanka's dismissal in March. Following the appointment of Garry Monk in June 2017, Percovich vacated his position, being replaced by Darryl Flahavan.
After a brief spell coaching at Fluminense, Percovich returned to Middlesbrough in June 2019, after being appointed as a first team assistant coach to new manager and former associate Jonathan Woodgate.
In December 2017, Percovich and his family were seriously injured after the vehicle he was driving in plummeted off a bridge. He personally suffered from "slight injuries", his youngest daughter was killed, whereas his other two children were seriously injured and on life support. His wife suffered from a fractured pelvis. His second daughter died a week later.
- "Percovich Joins TFC, Winsper Departs" (press release). Major League Soccer. December 14, 2009. Retrieved 2009-12-14.
- "Chicago Fire Announce Assistant Coaching Changes". chicago-fire.com. November 4, 2013.
- "Aitor Karanka: Middlesbrough name ex-Real Madrid man as boss". BBC Sport. 13 November 2013. Retrieved 1 July 2019.
- "Middlesbrough strike it rich with Premier League promotion". The Express Tribune. 7 May 2016. Retrieved 1 July 2019.
- "Middlesbrough chairman Steve Gibson says tired Aitor Karanka 'sacrificed himself'". Sky Sports. 17 March 2017. Retrieved 1 July 2019.
- "Middlesbrough FC's New First Team Staff To Join Up With Boro Boss Garry Monk". Retrieved 1 July 2019.
- "Leo Percovich shares poignant photos with son following cup win - just months on from crash tragedy". Gazette Live. Retrieved 1 July 2019.
- "Get To Know The New Coaches At Boro". Middlesbrough Football Club. 14 June 2019. Retrieved 1 July 2019.
- "Jonathan Woodgate: Middlesbrough confirm ex-England defender as head coach". BBC Sport. Retrieved 1 July 2019.
- "TRAGIC Ex-Premier League coach Leo Percovich injured in horror car crash which left his daughter dead and his two other kids in a 'critical condition'". The Sun. 18 December 2017. Retrieved 1 July 2019.
- "Leo Percovich's ten-year-old daughter dies one week after crash". ITV News. 25 December 2017. Retrieved 1 July 2019.