We all know the situation that happened this summer, Jonathan Huberdeau and Mackenzie Weegar were traded from the Florida Panthers to the Calgary Flames for Matthew Tkachuk.
Huberdeau was a 2011 3rd overall pick by the Panthers and Weegar was a 2013 206th overall pick by the Panthers and on December 9th in 2012, during the lockout year, Huberdeau and Weegar had a fight in the QMJHL.
This was before the Panthers drafted Weegar, but the fight was bad enough that even a referee was injured!