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.
I've been getting frustrated lately, and the only thing keeping me sane was the team winning and other people stepping up and scoring. Then you just kind of let it go and realize you can end the series with one shot, that frustration goes away for a brief moment, and that's what happened.
— Montreal forward Max Pacioretty after scoring the series-winner in Game 4 -- his first career playoff goal -- to eliminate the Lightning and send the Canadiens into the second round