2009-10: Colton Hargrove played in ten junior games with the NAHL’s St. Louis Bandits after splitting the season between the Dallas Stars U18 and St. Louis Amateur midget AAA teams. He had 2 assists and was an even plus/minus in four games with the Bandits during the regular season and scored 2 goals and was plus-one with 6 penalty minutes in six playoff games. In 16 games with the Dallas Stars U18 team he scored 5 goals with 6 assists and had 16 penalty minutes. He skated in 30 games for the Amateur Blues and had 14 goals with 10 assists and 72 penalty minutes.
2010-11: Originally selected by Indiana in the 2009 USHL Draft, Hargrove was obtained by Fargo in a trade and spent his first USHL season with the Force. Hargrove supplied physical play and was fifth on the team with 27 points as the offensively-challenged Force finished fifth in the Western Conference. In 56 games he was third on the team with 109 penalty minutes and was plus-nine with 13 goals with 14 assists. Fargo reached the second round of the USHL playoffs and in five games Hargrove was plus-three with 3 assists and 2 penalty minutes.
2011-12: Hargrove once again provided crunch and some scoring in his second season with Fargo. He led the Force in penalty minutes (140) and was the team’s third-leading scorer. In 54 games he scored 16 goals with 22 assists and was plus-one. Fargo finished fourth in the Western Conference and advanced to the second round in the playoffs. Hargrove was scoreless in six playoff games and was minus-one with 10 penalty minutes. He committed to playing college hockey at Western Michigan in 2012-13. In his third year of draft eligibility, he was selected by Boston in the seventh round (205th overall) of the 2012 NHL Draft.
2012-13: Hargrove played 32 games in his freshman season at Western Michigan. He was third on the Broncos with 9 goals and had 1 assist; finishing +6 with 29 penalty minutes. Western Michigan finished third in the CCHA but was swept my Michigan in a CCHA quarterfinal series and did not receive an NCAA tournament bid.
2013-14: Hargrove was the fourth-leading scorer and brought a physical edge to the lineup for Western Michigan in his sophomore season. He scored 11 goals with 13 assists and was +9 with 38 penalty minutes in 39 games; skating with a variety of linemates as Andy Murray mixed his forwards depending on the opponent. Western Michigan finished tied with Minnesota-Duluth for fourth place in the inaugural season of the National Collegiate Hockey Conference. The Broncos reached the semifinals of the NCHC tournament but did not receive an NCAA tournament bid after falling to North Dakota in the conference’s third-place game.
2014-15: Hargrove was the second-leading scorer for Western Michigan in his junior season, finishing one point behind team leader Sheldon Dries. He scored 14 goals with 14 assists and was +12 in 34 games. Hargrove was third on the Broncos with 80 penalty minutes. Western Michigan finished seventh in the NCHC. The Broncos took first-place Miami to a decisive third game in the conference quarterfinals, falling 4-0. Hargrove signed a three-year entry-level contract with Boston in March 2015 — foregoing his senior season at Western Michigan.
Hargrove is a big forward who loves to hit and play a grinding game in the dirty areas. He is heavy on the puck down low and tough to move from in front of the net. He has good hands and a feel for his linemates, though his bread and butter is certainly his power game.
Hargrove is skating for Boston AHL affiliate Providence in 2015-16 in his first pro season. Seeing steady ice time, he is among the team's leaders in points and penalty minutes. Hargrove does not have the pure offensive instincts or skills of a high end scorer but his size and demeanor suggests he can be a solid third- or fourth-line power forward.