Petri Pasanen

Pasanen was also a regular for the Finland national team. He made his international debut on 15 November 2000 against the Republic of Ireland. Pasanen has mostly played at right back for Finland, and has also served as the national team's captain, when Sami Hyypiä and Jari Litmanen have not played. He scored his only goal on 22 May 2002 in a home friendly at the Helsinki Olympic Stadium against Latvia, which Finland won 2–1. Pasanen has also played in Finland national futsal team, where he has six caps and two goals.

FC Lahti

Born in Lahti, Finland, Pasanen became a regular for local club FC Lahti during the club's promotion season in 1998. During the next two seasons he made 42 appearances for the club in Finland's Veikkausliiga.

Ajax

Many of Europe's top clubs had become interested in the promising Pasanen, and in the summer of 2000 he joined Dutch club Ajax. The transfer fee was not disclosed, but is believed to be around 6 million Finnish markka, which corresponds roughly to €1 million. He became a regular in the Ajax defense in his first season, but his progress was halted when he broke his foot in August 2001, and had to miss most of the 2001–02 season. Next season he was a regular again as Ajax reached the quarter-finals of the UEFA Champions League. He fell out of favour at Ajax in 2003–04, and spent the second half of the season on loan at English club Portsmouth in the Premier League. Portsmouth manager Harry Redknapp was interested in purchasing Pasanen at the end of the season, but claimed Ajax's asking price was too high.

Werder Bremen

Pasanen was then signed by reigning German champions Werder Bremen in the summer of 2004. He became a key player for the club, helping them to a top three finish in the Bundesliga and the second round of the Champions League in each of his first two seasons at the club. Whilst at Bremen he played in the 2009 UEFA Cup Final.

Red Bull Salzburg

On 30 June 2011, after the end of his contract, he left Werder…

After his playing career, Pasanen has worked as a youth coach for FC Lahti, and as an assistant coach of the club's first team during 2022–2023.

After his professional career, Pasanen has worked as a football pundit for Yle in 2014–2018, and for MTV Oy in 2018–2020. Since 2020, Pasanen has worked for MTV and C More Finland as a football studio host in UEFA Champions League matches and international tournaments. In May 2023, Pasanen worked as a studio host in 2023 IIHF Ice Hockey World Championship tournament.