2009-10: Selected by the Seattle Thunderbirds in the 2009 WHL Bantam Draft, Kerfoot played for the Vancouver NW Giants in British Columbia midget major hockey. In 26 games he scored 7 goals with 14 assists and had 4 penalty minutes.
2010-11: Kerfoot made his junior hockey debut, skating in six games for the BCHL's Coquitlam Express, and was the leading scorer in British Columbia midget hockey. Kerfoot was scoreless with no penalty minutes in his brief stint with Coquitlam, which included one playoff game. He scored 36 goals with 72 assists in 38 regular season games as the Vancouver NW Giants dominated the BCMML. In five playoff games he scored 6 goals with 6 assists as the Giants captured the playoff title to advance to the Telus Cup (Canadian national championship). In seven Telus Cup games he scored 9 goals with 13 assists and had 4 penalty minutes. Vancouver NW won its first four games but lost in overtime in the semifinals to eventual champion London and dropped the bronze medal game.
2011-12: Kerfoot was named the BCHL Coastal Division's Rookie of the Year after an outstanding season with Coquitlam and represented Canada West at the 2012 World Junior A Challenge. In 51 regular season games for the Express he scored 25 goals with 44 assists and had 24 penalty minutes. Coquitlam finished fourth in the Coastal Division. In the playoff series with Powell River Kerfoot scored 4 goals and had 6 penalty minutes in six games. In five games for Canada West at the WJAC he had 2 goals with 1 assist and 2 penalty minutes. Kerfoot committed to playing college hockey at Harvard in 2013-14. Ranked 165th amongst North American skaters in Central Scouting's final rankings prior to the 2012 NHL Draft, he was selected by New Jersey in the fifth round (150th overall).
Kerfoot is blessed with a tremendous amount of natural offensive skill. His best attributes though are his on-ice vision and hockey sense. His elite-level puck skills are evident in the fact that he is both a good passer and finisher. While his skating isn't quite what you'd expect from a player of his size, he is still quick and elusive and it's an area that he's worked hard to improve on. Despite being undersized, Kerfoot battles all over the ice and is not afraid of physical play.
Kerfoot is a long-term project for the Devils, but he has a lot of skill and the team has plenty of time to let him marinate and develop. His CHL rights are owned by the Seattle Thunderbirds, but he's made his intentions pretty clear that he'd like to play in the NCAA. He hasn't chosen a college just yet, but Boston College, Yale, and Harvard are a few of the school he's known to be considering.