Career
Mezlík started his football career in Rudíkov. In 1998 he moved to Football Club Zbrojovka Brno. On 22 May 1999, at the age of 15, he appeared in a league match against Football Club Karviná, becoming the youngest player in the history of Gambrinus liga.
He played in Brno until 2008, with the exceptions of loans at Football Club Hradec Králové and Vysočina Jihlava in 2006 and 2007.
In 2008 Mezlík moved to Saskatchewan Dynamo České Budějovice where he plays to date. Mezlík played for Czechoslovakian youth national teams since the under-15 level
