Next summer we're going to have to make a choice on him in the expansion draft. We can protect 3 defensemen, and McAvoy/Carlo are no brainers for two of them. 1st & 2nd year players are exempt, so Lauzon/Vaak are clean. That means the final choice is Gryz or Clifton. However, one of the caveats in the draft is that we must expose at least "* One defenseman who is a) under contract in 2021-22 and b) played in at least 40 NHL games the prior season or played in at least 70 NHL games in the prior two seasons.". Clifton only got about 31 games in last year (who knows if they prorate/adjust for COVID). If circumstances of injury or lineup shuffling cause Clifton/Moore/Miller to all get in less than 40 games this upcoming year, then we may be backed into a corner where we are forced to expose Gryz, unless we acquire a defenseman expressly for that purpose or bring back Chara on a two-year deal just to expose him.
Lauzon can be picked, so can Zboril/Clifton/etc. It's 2 pro seasons, not 2 NHL seasons. Lauzon is going on his 4th, so is Zboril.
Vaak is exempt as somehow (and I don't know the specifics, smarter posters than me have explained the how before) his 1st pro season doesn't count when it comes to expansion draft eligibility.
If Lauzon or Zboril play to the level that I think Sweeney and Co. expect them to this coming year, the choice of who the 3rd guy to protect isn't so clear.
Assuming A) Gryz is extended beyond 1-year, and B) Carlo and McAvoy are two of the three protected, if Seattle goes with a D-man they'll have a nice variety of players to choose from Boston, and one of Zboril/Lauzon/Clifton/Gryz will be gone. One of the four will be protected, leaving a choice of 1 out of remaining 3.
But if you consider that Vaak should be ready for NHL duty in 2021-22, it's not really that big of a deal.