2010-11: Hunter Smith played for the Windsor Junior Spitfires midget minor AAA team. In 30 regular season games he scored 15 goals with 15 assists and 64 penalty minutes. He scored 8 goals with 18 penalty minuets in nine playoff games. Smith was selected by the Windsor Spitfires in the second round (39th overall) of the 2011 OHL Priority Draft.
2011-12: Smith appeared in 15 regular season games and two playoff contests with the OHL’s Windsor Spitfires and played for the junior A LaSalle Vipers in the Greater Ontario Junior Hockey League. He scored 1 goal and was -6 with 19 penalty minutes with the Spitfires during the regular season and had no points or penalties in the playoffs. Smith scored 5 goals with 9 assists and had 109 penalty minutes in 41 games with the Vipers.
2012-13: Obtained by Oshawa in a trade with Windsor just before the start of the season, Smith skated in 33 games, including three playoff games, in his first season with the Generals. He had one assist and was -5 with 22 penalty minutes in 30 regular season games. The Generals finished second in the East Division and reached the second round in the playoffs. Smith had no points or penalties in the playoffs.
2013-14: Smith moved into a prominent role for Oshawa in his second season with the Generals and was a force in the OHL playoffs. In 64 regular season games he scored 16 goals with 24 assists and was +11 with 100 penalty minutes as Oshawa finished first in the East Division. In his second year of draft eligibility, Smith was ranked 39th amongst North American skaters in Central Scouting’s final rankings prior to the 2014 NHL Draft.