So, the Pens currently have Dumo, Petts, Matheson, Riikola and POJ on the left side. That's FIVE lefty dmen.

After this trade they have Dumo, Gio, Matheson, Lauzon, Riikola and POJ on the left side. That's SIX lefty dmen.

Do you see a problem here? And don't tell me ohhh, Lauzon plays both side. We already have dmen who do that in Riikola and Friedman. You've basically just created a glut of third pairing dmen for the Pens. Friedman has been playing far better than Lauzon. None of this makes sense.

Also, the Pettersson trade is more quantity than quality. Pettersson is worth more than that trade in quality.

EDIT: If Pettersson gets moved, which is unlikely, he'd get moved for a forward, not more dmen.

Vgk doesn’t need another defensemen. No idea how we’d take on his salary