The Anaheim Ducks' surplus of talented defensemen turned out to be just what the Vegas Golden Knights needed to snag Theodore.
The Ducks selected Theodore in the first round (No. 26) of the 2013 NHL Draft after two full seasons with Seattle of the Western Hockey League. He spent two more seasons with Seattle, finishing with 79 points (22 goals, 57 assists) in 70 games in 2013-14. He turned pro after finishing his junior career in 2015, getting nine 11 (four goals, seven assists) with Norfolk of the American Hockey League.