Hartman, who was chosen No. 30 by the Blackhawks, has 10 goals and a team-leading 21 points in 20 games with the Plymouth Whalers in the Ontario Hockey League this season.
Last season he had 23 goals and 60 points in 56 games with Plymouth and had three points in seven games to help the United States win the gold medal at the 2013 IIHF World Junior Championship in Ufa, Russia.
We're buyers. We're committed to winning. That's what [owner Vinnie Viola] has said all along and what we've said all along. We want to win. We want to win a championship. We're putting the pieces together, step by step, and we're hopeful that Jaromir can lead these young guys to the promised land. It's a win-win for us.
— Panthers GM Dale Tallon on Jaromir Jagr, who he traded for from the Devils on Thursday