Pettersson led the Canucks and all NHL rookies in points (66), goals (28), assists (38), power play goals (10), power play points (22) and game-winning goals (7; new Canucks rookie single-season record). He represented the Canucks at the 2019 NHL All-Star Game, becoming the youngest Canucks player and just the third Canucks rookie (Dale Tallon, Brock Boeser) named to the honour.
Pettersson began his debut NHL season with 10 goals over his first 10 career games, becoming just the fifth player to do so outside of the NHL's inaugural season. The fifth overall selection at the 2017 NHL Entry Draft, Pettersson also became the sixth NHL rookie since 1967-68 to record multiple five-point outings in a single season (Dec. 9 at STL and Nov. 2 vs COL) and the first Canucks rookie to score a hat trick that included the overtime winner (Jan. 2 at OTT).