Edited Oct. 2, 2020 at 3:00 p.m.
I tried the cap on Karlsson from WSH's side. Here's how I got it to balance, while still letting the Caps contend this year:
WSH
Karlsson, Erik
Chmelevski, Alexander
Chekhovich, Ivan
Dahlén, Jonathan [RFA Rights]
Additional Details:
6 g 34 a 40 p $11.5M
three prospects. No points, yet.
If Dahlen signs at 1M, the Sharks save 305k this year.
SJS
Oshie, T.J.
Pánik, Richard
Hagelin, Carl
Kempný, Michal
Additional Details:
49p+22p+25p+18p=114p.
A few teams want Kempny, so the Sharks can flip him for a pick, for some cap relief. Same with Panik. Hagelin got 25 points this year, and Oshie got 49, so SJ might as well keep them for most of a season and see how they do. Oshie is from Washington State, so Seattle might pick him. Then SJ is just left with Hagelin, at an average price, and great at killing penalties. The Rangers might take him to replace Fast, but they're divided. But you still get almost 9M in cap space within a year, without retention, and without giving up any picks. It just costs a #2 D and three top prospects, all of whom will play this year in the Caps' bottom six to make it work.
So I don't think SJ is stuck with Karlsson. They just have to do the math on how long until they'll be good again, and decide whether they'd rather pay three prospects to move him out or pay three or four years of his 11.5 million dollar salary to watch him grow old, without necessarily helping them contend at all, before he's old and they're truly stuck with him.
FWIW, I also had to move Copley out, and the Caps are left with no flexibility for next season, when they have to write extensions for Ovechkin, Vrana, and Samsonov. So in a year they end up trading Kuznetsov to make cap space, or letting Ovechkin walk, in this scenario. It's not ideal for them, but it does make them a really, really strong contender for one year.
Still, all in all, I think if the Caps kick in their 2020 1st and 4th, and the Sharks immediately get back a 3rd for Kempny and a 4th for Panik, they end up trading three pretty good prospects for a 1st 3rd, and two 4ths in order to trade six years of Karlsson (40 points) for five years of Oshie (49 points at half the price) and three years of Hagelin (25 points at a quarter the price). I know how Sharks fans feel about prospects, but I hear they also like draft picks.