On July 1, 2001, Reasoner (along with Jochen Hecht and Jan Horacek) was traded to the Edmonton Oilers in exchange for Oilers' captain Doug Weight and Michel Riesen. In November 2003, Reasoner suffered a severe knee injury when he crashed into the end boards. During the 2004–05 NHL lockout, Reasoner played 11 games for EC Red Bull Salzburg of the Austrian League. On August 9, 2005, Reasoner signed a one-year contract extension with the Oilers. On March 9, 2006, Reasoner (along with Yan Stastny and a second-round pick in the 2006 NHL Entry Draft (used to select Milan Lucic)) was traded to the Boston Bruins in exchange for Sergei Samsonov.
On July 4, 2006, as a free agent, Reasoner signed a two-year contract to return to the Edmonton Oilers. After the expiry of his deal, on July 17, 2008, Reasoner signed a contract with the Atlanta Thrashers.[3] On June 24, 2010, Reasoner (along with the Thrashers' first- (24th overall) and second-round picks in the 2010 NHL Entry Draft (used to select Joey Crabb and Jeremy Morin respectively)) was traded to the Chicago Blackhawks in exchange for Dustin Byfuglien, Ben Eager, Brent Sopel and Akim Aliu.[4] One month later, on July 22, 2010, due to salary cap restrictions within the Blackhawks' organization, Reasoner was traded to the Florida Panthers in exchange for center Jeff Taffe.[5] After the Panthers traded away captain Bryan McCabe, Reasoner was named an assistant captain.[citation needed]
On July 1, 2011, Reasoner signed a two-year contract with the New York Islanders.[6]
