Joseph is not projected as a big-time scorer at the NHL level; he had 39 points (six goals, 33 assists) in 62 games in his second season with Charlottetown of the Quebec Major Junior Hockey League.
His defensive play is what attracted the Coyotes.
"As a defender, he has the range and the tenacity to stay with it until the play turns his way," director of amateur scouting Tim Bernhardt said. "Getting physically stronger is important, but he's a guy who just needs to keep moving ahead and add layers to his game as he moves forward."
Joseph is attracted to the passion and enthusiasm of Nashville Predators defenseman P.K. Subban, but he patterns his game and approach after Marc-Edouard Vlasic of the San Jose Sharks.
"You just watch his hockey IQ; he's such an intelligent player with and without the puck and so effective on the special units," Joseph said of Vlasic. "He is quick with his feet and he moves the puck fast because he can anticipate the play."
Joseph also has a good role model to follow at home. His older brother, Mathieu, 20, was a fourth-round pick (No. 120) by the Tampa Bay Lightning in the 2015 draft and hopes to crack their roster this season.
"My whole family loves sports and stresses athletics," he said. "My mom was an athlete, my dad played hockey and my brother and I were on skates by the time we were 3 and 4 years old. I tried figure skating first to get my skating down, but I wanted to play hockey pretty quickly.
"Mathieu and I talk about what we're doing each day, and we cheer for each other. We wanted to talk about both playing in the NHL one day and what that would feel like. Every day of work puts us closer."