I rarely blame a RB for leaving early. They have a shorter career due to the pounding. A 30 year old back is considered to be on his last leg.
further adventures in Jed York being unsuited for his position
Living in Madison, I've witnessed two mega-backs get supplanted in their junior years. John Clay did it to P.J. Hill, then Montee Ball returned the favor and took advantage of a dinged up and out-of-shape Clay to capture the starting job (and hearts and minds of Madison). Both Hill and Clay bolted after their junior years, presumably because they saw the writing on the wall for their senior years. Must be the same situation with Baker. Seems to me like it would be to his advantage to solve the fumbling issues, work his butt off, and make Dantonio play him next year. Plenty of collegiate split-carry RB's have had great careers in the NFL.
Surprising decision... doesn't seem to make any sense. I'd be surprised if he gets drafted.