2007-08: Nick Mattson skated in 62 games for the US National U17 team and scored 1 goal with 19 assists. His 20 points were most amongst U17 NDTP defensemen. Mattson had 5 assists in six games at the U17 World Hockey Challenge.
2008-09: Mattson scored 4 goals with 19 assists in 63 games for the U18 USA National team and skated for the gold medal winning USA squad at the 2009 U18 World Junior Championship. In seven games at the world tournament he had 1 goal with 2 assists and was +1. Mattson committed to playing college hockey at North Dakota in 2011-12.
2009-10: Played for the USHL Indiana Ice, paired mostly with Taylor Boldt. Named to the 2010 USHL All-Star Game.
2010-11: Mattson skated in his second year in the USHL with Indiana, leading the team’s defensemen with 6 goals and 36 points in 57 games. His plus-33 rating ranked third overall on the team. Mattson added 2 assists in 5 playoff games for the Ice.
2011-12: Mattson skated in all 42 games as a freshman at North Dakota and was frequently in one of the Fighting Sioux’ top two defense pairings. He was the second leading scorer among a North Dakota defensemen corps that also featured fellow Chicago prospect Joe Gleason. Mattson scored 6 goals with 13 assists and was plus-five with 10 penalty minutes. North Daktota finished fourth in the WCHA and captured the Broadmoor Trophy playoff championship after back-to-back wins over Minnesota and Denver. Minnesota returned the favor in the NCAA West regional final, defeating North Dakota, 5-2 to end the Fighting Sioux season.
2012-13: Nick Mattson skated in 38 games in his sophomore season at North Dakota. Partnered with fellow Chicago prospect Joe Gleason part of the year, he scored 3 goals with 8 assists and was +8 with 8 penalty minutes. North Dakota finished third in the WCHA and earned an at-large bid to the NCAA tournament after an overtime loss to Colorado College in the WCHA Final Five semifinals. The Fighting Sioux lost to eventual national champion Yale, 4-1, in the NCAA West Regional Final.
2013-14: Mattson was one of four North Dakota defensemen to top 20 points; playing 40 games for the Fighting Sioux in his junior season. He scored 4 goals with 19 assists and was plus-8 with 6 penalty minutes. North Dakota finished second to St. Cloud State in the newly-formed National Collegiate Hockey Conference and lost to Miami, 3-0, in the NCHC semifinals; earning an at-large bid to the NCAA Midwest Regional after defeating Western Michigan in the league’s third-place game. The Fighting Sioux defeated Wisconsin and Ferris State to win the regional; falling to Minnesota 2-1 in the Frozen Four semifinals on a goal in the game’s final second.
Mattson is a two-way defender. He is very poised with the puck and makes good decisions. A strong skater, he needs to keep his game consistently high and bring an edge.
One of two seniors on a talented defense corps for North Dakota, Mattson has been paired with freshman Tucker Poolman much of the time early in 2014-15. Poolman (Winnipeg), one of the six (out of eight) Fighting Sioux defensemen who has been drafted, has shown a flair for the offensive game and Mattson has adapted his game at times to complement that role. Long-term, Mattson projects as a lower-pairing, strong two-way defenseman who is sound positionally.