Hockey runs in Mantha's blood. His grandfather Andre Pronovost won the Stanley Cup with the Montreal Canadiens four straight seasons from 1956-60.
So it shouldn't be surprising that Mantha has had a knack for scoring and winning during his career. After scoring 50 goals for Val-D'Or of the Quebec Major Junior Hockey League in 2012-13, Mantha scored 57 the following season, when he had 120 points to lead the league and was named the most valuable player. He also was named the CHL player of the year, scoring 24 goals in 24 playoff games to help Val-D'Or to the President's Cup as QMJHL champions.