Dunn played with his hometown Gatineau Olympiques of the Quebec Major Junior Hockey League last season, scoring 31 goals and adding 20 assists and 156 penalty minutes.
Drafted in the fifth round (138th overall) of the 2013 NHL draft, Dunn has recorded 116 points (61 goals, 55 assists) and 348 penalty minutes in 159 major junior career games with the Val-d'Or Foreurs and Gatineau.
He was traded by the Olympiques to the Rimouski Oceanic on May 30.
It is really special. I had a lot of friends and family here tonight, and for my first [NHL] game in here it was great. I played here as an elementary-school player in the city championships and this was my first time back. It was a lot of fun.
— Toronto native Brandon Pirri after scoring 2 goals for Panthers in win at Maple Leafs on Thursday