Washington Capitals defenseman John Carlson (74) skates with the puck against the Chicago Blackhawks during the first period an NHL preseason hockey game, Friday, Sept. 20, 2013, in Washington. (AP Photo/Nick Wass)

Photo by: Nick Wass

Washington Capitals defenseman John Carlson (74) skates with the puck against the Chicago Blackhawks during the first period an NHL preseason hockey game, Friday, Sept. 20, 2013, in Washington. (AP Photo/Nick Wass)