Petterson would probably be a pure rental though. Not really the Avs MO.
Also a RD, and I feel like they still want Manson in the top 4, so he'd mostly just be stapled to the 3rd pair as a Malinski replacement. Not a lot of room to have a big impact on improving the D core.
They'd probably have to move their 2026 1st either way, and if it's for a rental, that means the player won't help them next year, and they won't have next year's 1st at the deadline either.
Whoever it is, if CMac is overpaying especially, I think it's more likely for a guy with at least a year left so they can get two playoff runs out of them, and I think LD is more likely than RD, but we'll see.
Edit: Petterson is a LD not RD.