[2] He was transferred by Steaua București for 150.000$ in 2000 where under the guidance of coach Victor Pițurcă he helped the team win the 2000–01 Divizia A title by being its top-goalscorer as he netted the goal 12 times in 24 appearances, also winning the 2001 Supercupa României when he played all the minutes in the 2–1 victory in front of rivals Dinamo București and managed to become the 2002–03 top-goalscorer of the season with 21 goals.
[6] At Espanyol he is best remembered after scoring the victory goal in the 89th minute of his Primera División debut, a 1–0 against Villarreal and at the end of the game he threw his shirt to the stand where the team's fans where staying, but as a lot of them tried to grab it, the railing broke and they fell on the ground.
[2][13] In his following years, Răducanu became a journeyman, playing for various teams and leagues from Romania and worldwide, having a total of 154 appearances with 64 goals in the Romanian top-division, Divizia A.
[2][5][6][13] Claudiu Răducanu played two friendly games for Romania, making his debut on 30 April 2003 under coach Anghel Iordănescu in a 1–0 victory against Lithuania.
[14] In October 2014, Răducanu was arrested for the use of fake credit cards and for trying to bribe a police officer in Cancun, Mexico, spending one month and a half in jail.