We all know the Capitals are known to rock a microphone. This year a few Caps prospects will get a little more exposure on the world circuit. Darren Machesney, the starting goalie for the Caps’ top farm team in Hershey, will represent Canada in the Spengler Cup. Machesney has been in the Caps system since the 2005 draft, and has worked his way up from the South Carolina Stingrays to play for the Bears. The…