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 was chosen in the second round, 54th overall, of the 2011 NHL Draft by the Pittsburgh Penguins. He then signed a three-year entry-level contract with Pittsburgh in July of 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.
2012-13: Harrington returned to London for his fourth OHL season and made his pro hockey debut at the end of May following the Memorial Cup skating in the AHL playoffs for the Penguins’ AHL affiliate, the Wilkes-Barre/Scranton Penguins. He was an assistant captain for Canada in his second world junior tournament. Harrington scored a goal in his first pro game, a 4-2 loss to Syracuse in the Eastern Conference finals, and was -4 in two AHL playoff games. He played 50 regular season games for London, missing time in February with an “upper body injury”, and scored 3 goals with 16 assists; finishing +21 with 26 penalty minutes. In 17 OHL playoff games he was -6 with 4 assists and 14 penalty minutes as London captured the OHL championship. Harrington scored 1 goal with 1 assist and was -2 in five Memorial Cup games. In six games for fourth-place Canada at the 2013 World Junior Championship h was +5 with 2 assists and 2 penalty minutes.
2013-14: Harrington made the jump from junior hockey to the AHL as a 20-year-old — skating for Penguins affiliate Wilkes-Barre/Scranton. The only player to skate in all 76 games for the Penguins, he scored 5 goals with 19 assists and was +9 with 55 penalty minutes. The Penguins finished second in the East Division and reached the AHL Eastern Conference finals for the second straight season. In 16 playoff games Harrington had 1 assist and was -2 with 12 penalty minutes.
2014-15: Harrington made his NHL debut with the Penguins in a December 18th game against Colorado, skating in 10 games with Pittsburgh when the Penguins’ defense corps was beset by injuries before returning to Wilkes-Barre/Scranton. He was -10 with no points and 4 penalty minutes, averaging 15:48 minutes of ice time. Harrington played in 48 regular season games for Wilkes-Barre/Scranton. He scored 2 goals with 10 assists and was +19 with 20 penalty minutes. The Penguins finished second in the East Division and reached the second round in the playoffs. Harrington was +2 with 1 assist in eight playoff games. The Maple Leafs acquired Harrington from Pittsburgh in July 2015 as part of the multiplayer trade that sent Phil Kessel to the Penguins.
2015-16: Harrington made the Maple Leafs out of training camp — skating in 15 games and missing four games with an upper-body injury before being assigned to the AHL’s Toronto Marlies at the end of November. He played 15 games with the Marlies before suffering a season-ending injury. Harrington had 1 assist and an even plus/minus with 4 penalty minutes, averaging 13 minutes of ice time with the Maple Leafs. He scored 1 goal with 2 assists and was +4 with 14 penalty minutes playing for the Marlies.
Harrington is a reliable two-way defenseman with phenomenal hockey IQ and on ice-awareness. He is a strong, mobile skater and is particularly adept winning 50/50 battles in the corner and quickly getting the puck out of the defensive zone. Harrington has the vision and puck-skills to make good first passes and start the play up ice. He ultimately projects as a safe and smart stay-at-home defenseman capable of making a good first pass and playing 15-20 minutes a game.
Harrington was slowed by injury in his first season in the Toronto organization in 2015-16. After opening the season in the NHL with the Leafs and skating in 15 games he was assigned to the AHL's Marlies, playing 17 games before suffering a season-ending injury. Harrington will be an unrestricted free agent if not tendered a qualifying offer by Toronto. A defense-first defenseman with limited offensive elements to his game, Harrington projects as a solid, lower pairing defenseman.