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Kleven brings what the Sens don’t have, toughness and size on D. We can’t afford to trade him.

OTT rejects the Jarry trade. Vegas also rejects.

none of the 3 listed above are small. Chabot and Sanderson are both large, and Sanderson definitely brings "toughness"

almost sounding like a TOR fan, where an obsession of "toughness" leads to disaster.

Fact is, he's not the 3 best LD in OTT. It would be a HUGE mistake for OTT to instead send PIT Hamara, who looks really damn good and is clearly a greater pedigree of player.
Just like it would for OTT to sit him for Kleven. Hamara is very solid defensively and has really good puck moving skills to get it out of his own zone. You don't sit that.

You play your 3 best. Like every other team should. That's how you win games. Not by worrying about "toughness."

no VGK does not.
Whitecloud is their 3RD going forward. They made that bet on the contract they signed. They are stacked on the RD side. so there is no room there.
Korczak is no better than a 3RD.

On the LD side, Martinez is out the door. McNabb is 34 and one step out the door. Hutton is a 7th guy. Which means they will need a 3LD.
So the trade works for them. Swap one cheap 3rd pairing defenseman for another to more fit your depth needs.

Am I the only pens fan that thinks Blomqvist should stay in the AHL? Goalies notoriously take longer to make the jump to the NHL, and many teams have star goalie prospects still not consistently playing even back up roles, Levi, Wolf, and Wallstadt. I’m not saying he can’t make the jump, but the others haven’t and Ned while being pretty good for most of the season (same with jarry) didn’t end the greatest.