At some point down the road, maybe in 5 or 7 years, conversation can get more serious about whether Joe Mauer would make a fine third baseman or outfielder or half-time DH. Right now, from what I can tell, the “stress reaction” that is sidelining Mauer is at the lower-end of the bone injury scale — more than a bone strain, less than a stress fracture.
The best explanation of what’s happening, providing the Twins aren’t minimizing Mauer’s injury, is at clinicalsportsmedicine.com. This looks like an injury from overuse, and one that was caught before it could work its way up the graph from “reaction” to “fracture.”
Here’s a link. The most pertinent stuff is toward the bottom half.
(Friday a.m. update: The Hardball Times offered up this look at Mauer’s injury, with a note to fantasy leaguers at the end.)
Stay calm, for now.