2008-09: Scott Harrington appeared in two games for the Kingston Voyageurs in the Ontario Junior Hockey League while spending the bulk of the season with Greater Kingston's midget major team. He had one assist and 2 PMs for the Voyageurs. In 66 games with Greater Kingston, he scored 19 goals with 48 assists and garnered 46 PMs. Harrington was selected by the London Knights in the first round (19th overall) of the 2009 OHL Priority Draft.
2009-10: Harrington played 55 games as an OHL rookie with the London Knights. He scored 1 goal with 13 assists and was +25 plus/minus with 20 PMs as the Knights finished first in the Midwest division. Harrington played in 12 playoff games as London defeated Guelph in the first round before falling to Kitchener in a seven-game, second-round series. He had 2 assists and was +5 with 4 PMs. Harrington won a gold medal with Team Canada at the Ivan Hlinka Memorial U-18 tournament.
2010-11: Harrington skated in 67 of 68 games for the OHL's London Knights and represented Canada at the 2011 U-18 World Junior Championship. Harrington scored 6 goals with 16 assists and 51 PMs for the Knights. He was -14 as the team finished last in the competitive Midwest Division yet reached the OHL playoffs. In six playoff games against Memorial Cup-bound Owen Sound he was -5 with 1 assist. In seven games with fourth-place Team Canada in Germany he was +2 and scoreless with 8 PMs. Harrington signed a three-year entry-level contract with Pittsburgh in July, 2011.
2011-12: Harrington was one of the top defensemen in the OHL playing for league champion London and played for bronze-medal winner Canada at the 2012 U-20 World Junior Championship. An assistant captain for the Knights as an 18-year-old, Harrington scored 3 goals with 23 assists and was plus-26 with 32 penalty minutes. Despite missing time with a shoulder injury and playing in just 44 games, he was named to the OHL 1st All Star team. The Knights rolled through the playoffs after finishing with the league's best record. Harrington was plus-11 with 1 goal, 6 assists and 6 penalty minutes in 19 playoff games. London reached the Memorial Cup semifinal game and in four Memorial Cup games Harrington was minus-two with 3 assists. In five games at the WJC he scored 1 goal with 3 assists and was plus-seven. Canada defeated Finland in the bronze medal game.
Harrington is a reliable two-way defenseman with phenomenal hockey IQ and on ice-awareness. The foundation of his game is centered on his strong, mobile skating ability and good awareness in his own zone. He is particularly adept winning 50/50 battles in the corner and quickly getting the puck out of the defensive zone. Harrington also has the vision and puck-skills to make good first passes and start the play up ice.
In terms of weaknesses in his game, the biggest thing holding Harrington back from professional play is his age and general lack of experience. Unlike most defensive prospects, Harrington has little problem absorbing and applying the complexities of professional style systematic hockey. His style of game is pro-ready and with continued maturity and experience he should have little difficulty making the eventual transition to the NHL.
Harrington will return to the London Knights for the 2012-13 season where he will likely play top-pairing minutes. He ultimately projects as a safe and smart stay-at-home defenseman capable of making a good first pass and playing around 20 minutes a game.