• Armia played in SM-liiga, Finland's top professional league in 2010-11, recording 18 goals, 29 points and 24 penalty minutes in 48 regular-season games as a 17-year-old.
• At the 2011 Under-18 World Championships, he led Finland and tied for third overall with 13 points (4-9--13) in six games on the way to a fifth place finish. He also represented Finland at the 2010 Under-18 Ivan Hlinka tournament.
• He competed for Finland at the 2011 World Junior Championships; the second-youngest player on the team, he had one assist in six games as Finland finished sixth.

"He's big and tall but surprisingly mobile for a player of his size. He has a very good feel for the game and moving the puck well with his linemates. He has a heavy wrist shot that he gets off quickly and is always looking for the empty spots on the ice. He's a sniper with a good selection of shots. You might have to look for him during some shifts, but then, suddenly, he scores the winner."

Assat Pori coach Pekka Rautakallio
“He's going to be a different kind of Finn in the NHL. He just needs to add a couple more kilos to that frame of his. I know there have been comparisons to Teemu Selanne, but while they both have that sniper mentality, Teemu was quicker when he arrived in the NHL. The thing I like about Joel is he's very humble. He wants to know what I expect and he's willing and ready to execute it. That tells me he really wants to learn how to play, how to be a better hockey player.”