Most of that work was done with Lethbridge of the Western Hockey League, where Addison had 65 points (11 goals, 54 assists) in 67 games last season. But that couldn't match the value of playing three games with Wilkes-Barre/Scranton of the AHL.
"Just to get out there and get a feel for everything and see what everything's like on a day to day basis, it was great for me," Addison said. "That's the biggest difference, is just playing against bigger and stronger guys. It's men rather than kids."
He'll gain more experience at training camp this season. Since it's unlikely he plays in the NHL, he'll take his lessons learned against bigger competition back for one more WHL season.
Tom Kostopoulos, Pittsburgh's player development coach, said he was impressed with how Addison handled himself around some of Pittsburgh's core players last season during training camp. He's since seen Addison mature further.
"Seeing how much time a guy like Sidney Crosby, [Kris] Letang and those guys, how much time and effort they put into their game, I think it's eye-opening for a lot of junior kids in their first training camp," Kostopoulos said. "I think he went back to junior and really worked on his game and took a lot from camp last year. You can just see him developing. You can see his confidence on the ice."
Despite admitting his defense still needs work, that confidence was on display at Addison's locker stall during development camp.
"They [drafted] me for a reason," Addison said. "That was just to play the way I play. ... They just let me play my game."