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.
Mattson is a two-way defender who improved late in the season. Very poised with the puck and makes good decisions. Strong skater. He needs to keep his game consistently high and bring an edge.
A prolific start to his freshman season eventually gave way to a slower second half, but Mattson should continue to see plenty of ice time for the University of North Dakota during his sophomore year in 2012-13.