Career
He played for Naoussa F.C. and PAOK Football Club until his sudden death on 9 February 1998 in a car accident outside Thessaloniki. He was 21 years old. Katsouris began his professional career in Naoussa where he transferred from Academy Platonas Athens at age 17,making his debut in the First Division in 1993, with Naoussa being relegated that season. After two seasons at the Second Division he transferred to PAOK in the summer of 1996, along with major players such as Theodoros Zagorakis, Paris Zouboulis, Alexis Alexiou, Giorgos Toursounidis and Zisis Vryzas.
Katsouris made his debut that season in match against OFI in the Greek League and scored his first goal in a 1–0 victory over Athinaikos.
By the end of his first season he had played in 21 league games, scoring 1 goal. At early morning of 9 February 1998 Katsouris was returning from an amateur 5x5 match, when his car skidded due to excessive speed, hitting the barriers at the Thermi interchange outside Thessaloniki.
His death was verified in The American Hellenic Educational Progressive Association hospital shortly afterwards. He was buried on 12 February in the Anastaseos Cemetery in Thessaloniki.
A bust was erected in his memory in Toumba Stadium, and a memorial was erected near the spot where he died.
Memorial services are held each year, where the players and board of PAOK Football Club are ever present. In February 2009, PAOK Football Club announced that a football tournament, which bearing his name, would be held annually. Katsouris" number 17 jersey was permanently retired by the club in his memory.