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.
He is, in my opinion, one of the best defensemen in the NHL and continuing to grow. I think his game, from an offensive standpoint, he continues to drive our offense... I think there's still tremendous upside for Oliver.
— Coyotes GM Don Maloney on defenseman Oliver Ekman-Larsson