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Mika Väyrynen (born December 28, 1981 in Eskilstuna, Sweden) is a Finnish footballer who currently plays for Derby County in the English Premier League after signing from PSV Eindhoven on 10th August 2007.
A two-way midfielder, Väyrynen played for FC Lahti and FC Jokerit in Finland's Veikkausliiga before joining the Netherlands' SC Heerenveen in 2001. During his four seasons at Heerenveen he became one of the club's key players, making a total of 101 appearances and scoring 17 goals in the league.