Career
Michálek has also previously played in the National Hockey League for the Minnesota Wild, Saint Louis Blues and Pittsburgh Penguins. He is the older brother of Toronto Maple Leafs winger Milan Michálek. Michálek played two seasons of major junior ice hockey for the Shawinigan Cataractes of the Quebec Major Junior Hockey League (QMJHL).
Michálek made his National Hockey League debut during the 2003-2004 season with the Minnesota Wild, the Aeros" National Hockey League affiliate.
In 2005, Michálek was traded to the Phoenix Coyotes in exchange for Erik Westrum and Dustin Wood. He played five seasons for Phoenix, leading the League in blocked shots during the 2008-2009 season.
On July 1, 2010, the first day of the National Hockey League free agency period, Michálek signed a five-year, $20 million contract with the Pittsburgh Penguins as an unrestricted free agent. Prior to his signing, Michálek was described as "The Defenseman Every Team Wants" by America Online Fanhouse due to his strong defensive skills, durability and shot-blocking.
On June 22, 2012, during the 2012 National Hockey League Entry Draft, Michálek was traded back to Phoenix in exchange for Harrison Ruopp, goaltender Marc Cheverie and a 2012 third-round draft pick (81st overall).
Michálek played two further seasons in the Coyotes organization, whereupon in 2014-2015, as a pending unrestricted free agent, he was traded at the National Hockey League trade deadline on March 2, 2015, to the Saint Louis Blues, along with a conditional third-round pick in 2015, in exchange for prospect Maxim Letunov, despite Michálek recovering from a concussion at the time. On July 1, 2015 Michálek was re-signed by the Coyotes as a free agent.