|Date of birth||11 July 1979|
|Place of birth||Pärnu, Estonia|
|Height||1.90 m (6 ft 3 in)|
|2003||→ Vålerenga (loan)||11||(1)|
|* Senior club appearances and goals counted for the domestic league only|
Piiroja made his international debut for the Estonia national team on 21 November 1998 in a friendly against Armenia. He was team captain from 2008 to 2011, and made a total of 113 appearances for Estonia before retiring in 2013. On 31 March 2015, Piiroja made his 114th and final appearance for Estonia in his testimonial match against Iceland.
Piiroja started playing football with his hometown club Rivaal, before moving to Pärnu. He made his Meistriliiga debut on 16 July 1995, five days after his 16th birthday, against Eesti Põlevkivi in the opening match of the season. 10 days later, on 26 July 1995, Piiroja scored his first goal in the Meistriliiga in a 2–4 defeat against Narva Trans and became the youngest goalscorer in Meistriliiga history at the age of 16 years and 15 days.
In 1996, Piiroja joined Lelle, a team affiliated with Flora. He played for Lelle from 1997 until 1999, when he was promoted to Flora's first team. With Flora, Piiroja won his first Meistriliiga title in the 2001 season. He won his second consecutive Meistriliiga title in the 2002 season and was named Estonian Player of the Year for the first time.
In August 2004, Piiroja signed a contract with Tippeligaen side Fredrikstad. On 12 November 2006, he scored twice in the 2006 Norwegian Football Cup Final against Sandefjord as Fredrikstad won 3–0. In 2007, Piiroja extended his contract for four more years. During his time with Fredrikstad, Piiroja won four consecutive Estonian Player of the Year awards, in 2006, 2007, 2008 and 2009. Fredrikstad finished the 2009 season in 14th place and were relegated from the Tippeligaen after a 0–2 loss against Sarpsborg 08 in the play-offs. Fredrikstad returned to the Norwegian top division after a season, with Piiroja scoring in both legs of an 8–1 aggregate win against Hønefoss in the promotion play-offs.
Piiroja made his international debut for the Estonia national team on 21 November 1998, in a 1–2 loss against Armenia in a friendly, replacing Viktor Alonen in the 85th minute of the match. Piiroja soon established himself as Estonia's first choice centre-back. In 2008, he succeeded Martin Reim as team captain. On 25 March 2011, Piiroja made his 100th appearance in a 2–0 win over Uruguay in a friendly. He was sent off by referee Viktor Kassai in the 76th minute of the first leg of the UEFA Euro 2012 qualifying play-off against Republic of Ireland, which Estonia went on to lose 1–5 on aggregate. Piiroja ended his international career in October 2013, but made one final appearance for Estonia on 31 March 2015, in his testimonial match against Iceland. He made a total of 114 appearances and scored 8 goals.
On 1 June 2016, Piiroja released his autobiography, Ninamees Raio Piiroja, õhuvõitleja, written by sports journalist Gunnar Press.
|Chengdu Blades||2013||China League One||18||1||—||—||18||1|
- Estonia score listed first, score column indicates score after each Piiroja goal.
|1||4 September 1999||Svangaskarð, Toftir, Faroe Islands||4||Faroe Islands||2–0||2–0||UEFA Euro 2000 qualifying|
|2||11 June 2000||Kadriorg Stadium, Tallinn, Estonia||9||Georgia||1–0||1–0||Friendly|
|3||28 March 2001||Tsirion Stadium, Limassol, Cyprus||14||Cyprus||2–2||2–2||2002 FIFA World Cup qualification|
|4||16 February 2004||Ta' Qali National Stadium, La Valletta, Malta||44||Malta||2–2||2–5||2014 Malta International Tournament|
|5||22 August 2007||A. Le Coq Arena, Tallinn, Estonia||68||Andorra||1–0||2–1||UEFA Euro 2008 qualifying|
|6||12 September 2007||Skopje City Stadium, Skopje, Macedonia||70||Macedonia||1–0||1–1||UEFA Euro 2008 qualifying|
|7||14 October 2009||A. Le Coq Arena, Tallinn, Estonia||91||Belgium||1–0||2–0||2010 FIFA World Cup qualification|
|8||11 August 2010||A. Le Coq Arena, Tallinn, Estonia||97||Faroe Islands||2–1||2–1||UEFA Euro 2012 qualifying|
- "Raio Piiroja". UEFA.com. Retrieved 16 April 2017.
- "Piiroja, Raio" (in Estonian). ESBL.
- "Katkend raamatust "Raio Piiroja. Õhuvõitleja". Millise vutiveterani suu Piiroja esimene värav lukku pani?". Õhtuleht. 4 June 2016. Retrieved 16 April 2017.
- "Meistriliiga kõige roosamad faktid". Soccernet.ee. 19 December 2008.
- "Noorelt koondisesse – kas edu valem?". Postimees. 15 May 2014.
- "SPORT-EKSTRA: Statistikapomm! Millised rekordeid omavad FC Norma, Raio Piiroja ja hooaeg 1997-98?". Õhtuleht. 6 March 2017. Retrieved 6 March 2017.
- "Raio Piiroja liitus Arnhemi Vitessega". Soccernet.ee. 31 August 2011.
- "Ametlikult Hiina esiliiga mees: Piiroja läbis edukalt meditsiinilise testi". Delfi. 18 February 2013.
- "Raio Piiroja lahkumismäng / Eesti - Island maavõistlus" (in Estonian). Postimees. Retrieved 24 October 2018.
- "Endine vutiäss Raio Piiroja saab uue elukaaslasega lapse". Postimees. 8 June 2016.
- "Fotod: esitleti Raio Piiroja elulooraamatut". Postimees. 4 June 2016.
- "Football PLAYER: Raio Piiroja". eu-football.info. Retrieved 4 July 2017.