Josh has 21,750,000, 21,750,000 and 16,000,000 or an 8 mil buyout. I would have them take on Grichuk's contract and I'd give a low level prospect.
Donaldson xwoba last year was .388. His xwoba in 2015 was .390. His batted ball profile last year was red across the board. He had elite contact stats. His defensive stats fell off a cliff, but those defensive stats can fluctuate wildly. It's entirely possible for those numbers to rebound and he's still an average 3rd baseman.
We wouldn't need Donaldson to play 3rd everyday. He can DH quite a bit too. His money falls off in 2 or 3 years depending if we pick up the option so good timing for when we need that money for our young stars.
He was a 2.2 win player with a .353 woba and a bad defensive year last year. If he had a .388 woba and wasn't so unlucky with the bat he would have been close to a 4 win player. There's also a strong chance he bounces back defensively. He could very well be a 3 to 4 win player who would be a pretty good hitter to have 6th in your lineup.