Assuming here that Keith and Smith both retire so Edmonton will have an extra $13.4M in cap space ($5.8M from Keith, $2.2M from Smith and $3.4M from recapture on Keith)

I know Edmonton fans will hate this but its exactly the kind of trade Holland likes to make, moving picks/young players for hard-hitting, established and winning veterans. It's not far off the Keith trade from last year for example. He has also made it pretty clear that he is interested in moving on from Puljujarvi and wouldn't commit to him being back at the end of the year presser.

Muzzin places Keith, Simmonds adds some grit and Kallgren can be a third-string behind Skinner and Edmonton's next starter. He's on a two way so this makes sense to have an NHL-proven goalie that can go up and down as needed so Skinner can develop and in case of injuries.

A player who can move in and out of the top 6 for Pit.

Leafs avoid any potential shocks in arbitration and also don't need him once they have Marner/Nylander/Puljujarvi on the right side.

Rumours are that Chicago actually valued Mrazek as an experienced NHLer who can play decent but not ruin their chances at a high pick. I've added some high performing AHLers who could breakout and that many have thought would become good players but haven't gotten extended looks on the Leafs.

I'd be willing to add a pick if Chicago wanted it but rumours are they don't so this seemed like a compromise between rumours they value him and my view that he has negative value.

Assuming they will buy out Myers, then Holl fits perfectly as their 3RD and the Preds walk away with $1M more in cap space.

If the devils are serious about being better next year this nets them a 50 point player who is great defensively and kills penalties.