2009-10: Emil Pettersson played for Timra's second team in Sweden's Division 1 U18 league and skated for Medlepad in the 2010 TV-Pucken tournament for high school age players in Sweden. In seven TV-Pucken games he scored 2 goals with 2 assists and 2 penalty minutes.
2010-11: Pettersson moved up to Timra's top U18 team. In 34 games he scored 10 goals with 16 assists and had 26 penalty minutes. Timra finished second in the North Division and reached the playoff semifinals. Pettersson had 1 assist and an even plus/minus in five playoff games.
2011-12: Pettersson made his debut in Sweden's U20 SuperElit league as a 17-year-old – splitting the season between the Timra U20 and U18 teams. In 20 SuperElit league games, including three playoff games, he scored 5 goals with 3 assists and was an even plus/minus with 12 penalty minutes. Pettersson scored 19 goals with 22 assists in 31 games and was +29 with 94 penalty minutes in U18 play. Timra, after finishing second in the North Division, was upset by Skelleftea in the playoff quarterfinals. Pettersson scored 1 goal with 4 assists in three playoff games and was +1 with 10 penalty minutes.
2012-13:Pettersson made his debut in Sweden's Elitserien, appearing in two games for the Timra men's team, and was the leading scorer for Timra's U20 team. He was -1 with no points nor penalty minutes in Elitserien play. Timra was relegated to second division AllSvenskan after finishing third in the Kval Series playoffs. Pettersson score his first pro goal and was +1 in two Kval series games. He scored 13 goals with 31 assists in 44 U20 games and was -4 with 38 penalty minutes. He was scoreless and -2 with 2 penalty minutes in two SuperElit playoff games. In his second year of draft eligibility, Pettersson was ranked 80th amongst European skaters in Central Scouting's final rankings and was selected by Nashville in the sixth round (155th overall) of the 2013 NHL Draft.
The Swede, Emil Pettersson, carries with him a nice skill set as a puck distributing centerman. His strength is clearly his creative puck movement and on-ice vision in regards to setting up teammates. He has good height at 6’1 but needs to pack on muscle to his frame. That being said, he is a complete player and one who will kill penalties, take defensive zone draws, and quarterback a power play.
Pettersson has been very good at the international junior level and the junior level of Sweden, but has only just began to make an impact at the pro level in Sweden. That step will prepare him both physically and mentally for the rigors of North American hockey. He may compete for the Swedish U20 WJC team, but whether or not he sticks with Timrå in the Allsvenskan remains to be seen.