Finding no solace in his offensive numbers, Matheson was his own biggest critic.
"It's not hard to look at how the games went and know that I wasn't good enough this year," Matheson said bluntly. "I'm really disappointed in that, but at the same time you kind of just need to step back in the next little while, get away from the game a bit and then start fresh with summer training. I'm going to work like crazy and make sure I'm ready to go for next year."
Still, there's certainly no denying Matheson's boundless abilities and potential.
The 23rd overall pick in the 2012 NHL Draft, it's almost impossible to watch an entire Panthers game without at least one "wow" moment from Matheson. Whether it's a quick step around a defender or going coast-to-coast to score a goal, his skating and athleticism jump out at you.
Taking on a top-pairing role alongside Aaron Ekblad late in the season, the 25-year-old went on to finish his third full tour in the NHL with eight goals, 19 assists and a team-leading 132 blocked shots - 29 more than the next-highest Panther - while skating a career-high 22:19 per contest.
Looking ahead, Matheson believes consistency will be paramount as he works to return to form.
"I know that I have the ability and the tools to be a great player and a more consistent player," Matheson said. "That's exciting for me and the thing that kept me up the most at night is that I kind of felt that I let my teammates down in a lot of games. I never want to be in that situation again… We want to be in the playoffs every year, and I want to help my teammates get there."
With the arrival of new head coach Joel Quenneville, Matheson seems poised to break out in the coming seasons. In addition to piloting the Chicago Blackhawks to a trio of Stanley Cups (2010, 2013 and 2015), Quenneville also succeeded in developing some of the league's top defensemen -- such as Duncan Keith, Brent Seabrook and Niklas Hjalmarsson -- along the way.
As he approaches the 300-game benchmark in the NHL (he currently sits at 240), it's clear that Matheson, armed with an incredible work ethic and a yet-to-be-sniffed ceiling, is willing and eager to do whatever it takes to help both himself and the Panthers reach the league's pinnacle.
"He's seen it all," Matheson said when asked about the impact Quenneville will have on the organization and its players "He's been to the Stanley Cup Final, and he's won. He knows how to handle the ebbs and flows of the year and how to get the most out of his players. He knows how to help them reach their goal of winning the Stanley Cup. That's exactly what we want."