"There's definitely times where I lost my cool," Hartman said.
There were also times when Dent would take Hartman into his office and tell him that he'd better find the right side of the line or he'd never get to Chicago.
"I told him Chicago does not take penalties," Dent said. "I said it's all about back pressure, all about sticks. It's not so much about physicality and contact; it's more about discipline and 5-on-5 hockey. So we had some heart-to-hearts, and I also had to sit him out. When is when, right? I sat him out for a period in Chicago against the Wolves one night to try to just help him."
The Blackhawks banked on Hartman finding his way because they didn't have any other choice after they traded Andrew Shaw to the Montreal Canadiens on June 24 because of salary cap constraints.
Hartman is physical and skilled, just like Shaw. He's also a rookie on an entry-level contract, whereas Shaw was due a raise, which he got from the Canadiens in the form of a six-year, $23.4 million contract.
The Blackhawks hoped Hartman would be the newer, younger, cheaper version of Shaw, but that he wouldn't come with the same type of undisciplined penalties Shaw was prone to take.
Hartman understood all that too. He saw the opportunity in front of him and remembered his talks with Dent, which is why he worked extensively this past summer with Dr. James Gary, Chicago's mental skills coach.
He recommended Hartman read two books: "Mind Gym: An Athlete's Guide to Inner Excellence," by Gary Mack; and "Finding Your Zone: Ten Core Lessons for Achieving Peak Performance in Sports and Life," by Dr. Michael Lardon.
"There's a lot of stuff in golf that they talked about, how there's so many different shots and so many different things that go wrong that you just have to try to let things go and focus on the next one," Hartman said. "I think you can relate to that shift-by-shift wise. You may have a bad shift, but you take that and just look forward, kind of just let the past go."