Don't expect Crochet or his agent to agree to any team-friendly deal. They both know what a guy of his caliber at his age is worth.
Put it this way: the main reason Yamamoto got $300 million is because he was 25. And last year, in their first as MLB starting pitchers, Crochet was better. With LA and Chicago treating each gingerly, trying to protect their arms (and in Crochet's case, his value), Garrett had 4.1 WAR, while Yama had 1.7 WAR.
The Red Sox know Crochet is worth market value. They didn't give up such a haul for just two years of an ace.
But don't be surprised if they lowball him, and act like he should feel privileged to play for such a storied franchise.
After all, even if Crochet is great and unextended the next two years, the smart Sox may think they'll get to pay him less total money when he's 27 with two more seasons of mileage on that arm when they get serious about locking him up longterm.
And then he'll either be a Dodger, Met or Yankee. Or Phillie, if Dombro's still in charge.