2009-10: Sven Andrighetto played for the GCK/ZSC Lions U20 team in Switzerland as a 16-year old and led the ZSC U17 team in scoring. He scored 3 goals with 4 assists in 14 games and had 4 penalty minutes in U20 play. ZSC's U17 team captured the league regular season and playoff championships. Andrighetto scored 24 goals with 31 assists in 22 regular season games and had 16 goals with 8 assists in 10 playoff games. He represented Switzerland in the 2010 U18 World Junior Championship; finishing -3 with 3 assists and 2 penalty minutes in six games.
2010-11: Andrighetto played in Switzerland's second pro league, National League B, skating for GCK Lions and Visp, and represented Switzerland in the 2011 U18 World Junior Championship. In 36 games for GCK he scored 11 goals with 12 assists and had 20 penalty minutes. Loaned to eventual B League champion Visp, he was scoreless in two regular season games and played in 17 of 21 playoff games; scoring 1 goal with 2 assists and 12 penalty minutes. Andrighetto scored 3 goals with 2 assists and had 8 penalty minutes in the 2011 U18 WJC. He was selected by Rouyn-Noranda in the first round (11th overall) of the CHL Import Draft.
2011-12: Andrighetto made the move from Switzerland to Canadian major junior hockey and was the leading scorer for Rouyn-Noranda in his first season in North America. He scored 36 goals with 38 assists in 62 games and was -23 with 50 penalty minutes. The Huskies reached the QMJHL playoffs despite finishing last in the West Division. Andrighetto had 2 assists and was -6 with 4 penalty minutes in the four game playoff series with Shawinigan. He also played for Switzerland in the 2012 U20 World Junior Championship and scored 1 goal with 1 assist, finishing -2 with 2 penalty minutes, in six games. Andrighetto was ranked 196th amongst North American skaters in Central Scouting's final rankings but was not selected in the 2012 NHL Draft.
2012-13: Andrighetto returned to Rouyn-Noranda for a second season and was one of the top scorers in the QMJHL playoffs as the Huskies reached the semifinals. Finishing second in the QMJHL with 67 assists during the regular season, he scored 31 goals to lead Rouyn-Noranda with 98 points in 53 games and finished the year +25 with 45 penalty minutes. The Huskies finished second in the West Division before their playoff run. Andrighetto scored 8 goals with 22 assists in 14 playoff games, finishing fourth amongst all QMJHL players with 30 points, and was +4 with 14 penalty minutes. He played for sixth-place Switzerland at the 2013 U20 World Junior Championship, scoring 5 goals with 3 assists in six games. Andrighetto, in his third year of draft eligibility, was not among the 210 North American skaters in Central Scouting's final rankings and was selected by Montreal in the third round (86th overall) of the 2013 NHL Draft.
Andrighetto will compete for a top-six forward spot at the AHL level in Hamilton but could see time in the ECHL if he struggles to adjust to the speed and size at the pro level. He's expected to bring offensive production and help the Bulldog's power play this coming season. With a three year NHL entry-level contract, the offensively talent winger has time to develop his overall game in order to make the jump to the NHL in the near future.