Since becoming a full time player back in the 2018-19 season, Pettersson has been a very effective two-way defenceman that's improved with time. His offensive game isn't much to write home about, but last season he had a career high of 4 goals and 30 points. More impressive was his +28 on ice rating on a Penguins that struggled and missed the playoffs. So far this year, Pettersson has 5 points in 10 games and has a great analytical profile.
The Oilers defence early this season has been a clear point of weakness, and if they make one high impact trade through the year, it needs to be a home run add for the blue line. If there aren't any perfect right shot defenceman available, the Oilers will be forced to look at the rest of the field - hopefully, whatever decision they finally make will pay off.