2008-09: Played in 23 games in his OHL rookie season for the Niagara IceDogs. Visentin posted a 3.31 goals-against average and a .901 save percentage while compiling a 5-11-2-1 record.
2009-10: Carried the load for the IceDogs, playing in 55 games for that club. He turned in a 2.99 goals-against average and a .911 save percentage, going 24-26-0-5 on the season. He also appeared in 5 playoff games for the IceDogs, finishing with a 3.54 goals-against average and a .904 save percentage. Visentin played for Team Orr at the 2010 Top Prospects Game.
2010-11: Visentin was named the OHL Goaltender of the Year and skated for Canada at the 2011 U20 World Junior Championship. He appeared in 46 games for the Niagara IceDogs during the regular season and was 30-15 with nine losses coming in overtime. He had 4 shutouts with a 2.52 GAA and .917 save percentage. After finishing second in their division the IceDogs reached the OHL semifinals and in 14 playoff games Visentin was 9-5 with 1 shutout, a 2.55 GAA and .929 save percentage. Visentin was in net for four games for Canada at the junior tournament and was 3-1 with the only loss coming in the gold medal game. Russia made a monumental comeback in that game, scoring five third-period goals to overcome a 3-0 deficit. Visentin finished the tournament with a 2.01 GAA and .923 save percentage.
2011-12: Visentin was one of the OHL's top goalies in his fourth season with Niagara and skated for the bronze medal-winning Canada squad at the 2012 U20 World Junior Championship. Playing for an Ice Dogs team that finished first in the Central Division and allowed a league-low 169 goals, Visentin led the OHL in goals against (1.99) and shutouts (10) and was 30-9-2 with a .926 save percentage. Visentin played 20 playoff games as Niagara reached the OHL Finals and was 13-7 with a 2.51 goals against and .915 save percentage. Splitting time with Devils prospect Scott Wedgewood at the WJC, he appeared in four games and was 3-1 with 1 shutout for Canada, with the loss coming in relief of Wedgewood in the semifinals against Russia. Visentin finished with a 1.43 goals against and .644 save percentage for the tournament.
One of the best OHL goalies over his four-year career, Visentin is an athletic goaltender with good size and excellent rebound control. On top of his calm demeanour in goal, Visentin has shown tremendous character and leadership qualities as someone who leads by example through his strong work ethic.
His numbers in junior would certainly suggest that Visentin projects as a number one guy, but for any goaltender it isn’t always that easy. He will have to prove himself in the AHL before he can really be considered a future starter in the NHL.