2009-10: Drafted by London in the third round (51st overall) of the 2009 OHL Priority Draft, Fox appeared in 26 games with the Knights and skated in 23 games with the Strathroy Rockets in the GOJHL. He scored 1 goal with 6 assists and was an even plus/minus with 13 penalty minutes for the Knights during the regular season. Fox skated in two of twelve playoff games and had an even plus/minus with 1 assist. In 23 games for Strathroy he scored 11 goals with 10 assists and had 103 penalty minutes.
2010-11: Fox' ice time steadily increased in his first full season with London. In 51 games he scored 11 goals with 12 assists and was minus-two with 55 penalty minutes. The Knights reached the OHL playoffs despite finishing last in the Midwest Division. Fox played in all six playoff games in the first round series against Memorial Cup-bound Owen Sound and was minus-four with 1 goal and 6 penalty minutes.
2011-12: Fox was among the top scorers for league-leading London before being traded to last-place Erie in January in a trade-deadline deal. Fox scored 11 goals with 12 assists in 34 games with the Knights prior to the trade. He was one of the key offensive players for the Otters after the trade. In 62 games between the two teams Fox scored 23 goals with 31 assists and was minus-12 with 87 penalty minutes. Erie won just ten games and failed to make the OHL playoffs. Fox was invited to the NHL Draft Combine and ranked 46th amongst North American skaters in Central Scouting's final rankings prior to the 2012 NHL Draft.
Fox is a good skater with more defensive skills than offensive prowess. He is a smart player who makes the right play more often than not. Fox has a good compete level and isn't afraid to throw his weight around despite his average size. He is mostly a playmaker on offense, but his offensive game is not advanced. If he is to make it to the NHL, it will most likely be based on his defensive game.