Killorn, who was born in Nova Scotia but raised in Montreal, left Canada to play prep hockey in New England for the heralded Deerfield Academy program. Killorn was selected by Shawinigan in the 3rd round of the 2005 QMJHL Entry Draft but has chosen instead to pursue his education in the NCAA ranks. In 23 games in 2006-2007 Killorn had 19 goals and 33 points in 23 games with 56 penalty minutes. He was selected in the 11th round, 95th overall by the Omaha Lancers in the 2007 USHL Entry Draft but is expected to stay for one more season at Deerfield before moving on to college. At season's end he was ranked 55th among North American skaters by the NHL Central Scouting Services and 62nd by the Red Line Report. He was selected in the 3rd round, 77th overall by the Lightning in the 2007 NHL Entry Draft and was the youngest player in the 2007 draft pool.
In 2007-2008, Killorn was among U.S. prep leaders statistically all season. While the Deerfield co-captain cooled toward the end of the year, he still accumulated 24 goals and 27 assists for 55 points in 25 games.
It may be a long time before Killorn finally makes his way to Tampa. He is expected to play one more season of prep hockey before he moves on to Harvard of the ECACHL where he has committed to play his college hockey. The Lightning might not have the opportunity to sign Alexander until he completes his senior season so the team may have to wait 5 years in total before Killorn finally goes pro.
