2010-11: Dominik Masin split the season between Slavia Praha’s U18 and U16 teams in Prague, Czech Republic. In 19 U18 games (including three playoff contests) he scored 1 goal with 3 assists and was -15 with 20 penalty minutes. Masin scored 1 goal with 6 assists and was +19 with 24 assists in 20 games for the Slavia Praha U16 team.
2011-12: Masin played for Slavia Praha’s U18 team and represented the Czech Republic in U16 play. He had 3 assists and was -8 with 30 penalty minutes in 34 games for Slavia Praha. Masin played 13 international games with the Czech U16 team and was -3 with no points and 14 penalty minutes.
2012-13: Masin made his debut in the Czech U20 lead as a 16-year old and played for the Czech Republic’s U17 team. He scored 1 goal with 2 assists for Slavia Praha and was -1 with 16 penalty minutes in 25 U20 games. Masin scored 3 goals with 3 assists in 14 games (including two playoff games) with Slavia Praha’s U18 team. He played 21 games with the Czech U17 team, scoring 3 goals with 8 assists, and was -5 with 60 penalty minutes.
2013-14: Masin was with the Czech U18 team at the 2013 Ivan Hlinka Memorial Tournament before returning to Slavia Praha’s U20 junior team and was a captain for the Czech U19 team in the 2013 World Junior A Challenge. He was an even plus/minus with no points and 4 penalty minutes in four games at the Ivan Hlinka tournament and had 2 assists and 4 penalty minutes in four games at the WJAC. Masin was ranked 18th amongst European skaters in Central Scouting’s mid-term rankings prior to the 2014 NHL Draft.
Mašín is a versatile defenseman with leadership abilities who has been steadily moving up the ranks of the 2014 prospects. The versatile defenseman profits from his size (6'2") which allows him to stand tall in his own end, but also be a threat on the blue line. He's not much of a physical force when it comes to hitting, but he does his job back in the defensive zone. Masin has also displayed consistency throughout the season, steadily improving his game as the season has progressed.