A week from today, we'll know much more about the present and future state of affairs for the Tigers.
Here's what we know now, as has generally been the case all along.
By July 31, it's highly likely the Tigers trade Castellanos, it's probable they trade Shane Greene, and it's possible (veering toward unlikely) they trade Matthew Boyd.
If they trade the latter, they'll have to get a flat-out haul. They are open to packaging Boyd with either Castellanos or Greene to get the highest level of talent in return.
Though they're desperate for more high-level hitters in their farm system, the Tigers won't necessarily insist on position player prospects in trades. Detroit's top three prospects, and six of its top 10, are pitchers, according to MLB Pipeline.
The Tigers want talent, period.
Trading Boyd is their best way to land it, but they appear to be pricing teams out of the market. Per MLB.com, "the Tigers' prospect requests for Boyd have been so high that some in the industry doubt that he will be moved."
It's highly unlikely the Tigers are able to land another team's top prospect for Greene alone. There are a number of high-quality relievers on the market, and they don't typically fetch huge returns to start with.
And then there's Castellanos, whose value is the lowest. But he's a free agent to be, and the Tigers are committed to trading him. The Cubs appear to be the front-runners for Castellanos, though the Rays and Phillies have reportedly checked in on him as well.
It helps Detroit's cause that Castellanos has been crushing the ball over the past month.