With Aleksander Barkov and Vincent Trocheck firmly entrenched into the top two spots down the middle, and with captain Derek MacKenzie centering the fourth, that left McCann fighting with Nick Bjugstad and Denis Malgin for the role of the team's third-line center.
But McCann quickly turned that three-way tussle into a one-horse race during the preseason, showing off his big-league shot and speed with a hat trick against the Tampa Bay Lightning on Sept. 28. Not long after that, the Panthers officially awarded the spot to McCann - a position he held for the majority of the 2017-18 campaign - and moved Malgin and Bjugstad to the wings.
In 68 games, McCann set new career marks in assists (19), points (28) and ice time (13:15).
"It's just a confidence builder," McCann said after cleaning out his locker at BB&T Center in April. "I've already played a lot of games and hopefully I'm going to play in my 200th next year. Moving forward, I'm just going to keep building and keep becoming a better player."
At just 22, McCann is one of the youngest players on the Panthers, but also isn't necessarily lacking experience. He has already suited up in 166 NHL games over parts of three seasons with Florida and Vancouver, notching 53 points (19 goals, 34 assists) and a plus-4 rating.
Already known for his offensive abilities, McCann said the biggest improvements he made this season were on the defensive side of the puck, where he posted a career-best 32 blocked shots and 39 takeaways. At 5-on-5, he started 51.9 percent of his faceoffs in the defensive zone.
"I feel like this season I took a lot of strides defensively," he said. "Next year, for me to be more confident as a player would be a big help for the team. Moving forward, I'm going to work on that over the summer, whether it's working on my shot, my skating or my offensive abilities."
With a big summer ahead of him, McCann will look to continue his upward trajectory in 2018-19.
"This summer's going to be huge for me," he said. "I'm going to work out hard and start training as soon as possible. I'm going to come back even better."