Devils chief executive Lou Lamoriello announced the signing Monday without releasing contract details.
The 84th pick in the 2010 draft, Wedgewood spent the past four seasons with Plymouth (OHL), posting a 28-10-3 record with three shutouts, a 3.02 goals-against average and a .911 save percentage in 43 games this season. He has a 61-39-5 mark with six shutouts in 122 regular-season contests.
Wedgewood posted a 2-0-0 record in helping Canada earn a bronze medal at the 2012 World Junior Championships. He will attend his third training camp with the Devils in September.