[3] Horgan won his first Northern Ontario junior title in 2014, earning him and teammates Nicholas Servant, brother Jacob and Maxime Blais the right to represent the region at the 2014 Canadian Junior Curling Championships.

The next year, Horgan again won the Northern Ontario title, this time with his brother Jacob at third and Connor Lawes playing second.

At the 2015 Canadian Junior Curling Championships, Horgan again led Northern Ontario to a 5–5 record.

Horgan went undefeated at the 2016 Northern Ontario Junior Curling Championships, winning his third straight title.

However, Manitoba's Matt Dunstone rink proved to be the better team, defeating Northern Ontario 11–4 to claim the championship.