abs, special teams: out
They're dropping like not-particularly-likley-to-see-the-field flies up in here. Over the last 12 hours, Scout's Andre Barthwell and Sam Webb broke the news that Michigan has lost Marvin Robinson and Mike Jones from the roster.
As departure impacts go, these are near the bottom of the scale. Both were going to be seniors (Jones was a fifth year) and neither was likely to see much playing time outside of special teams. These exits don't affect the two deep or the projected numbers for the 2014 class.
Robinson and his heralded abs never got a foothold on playing time, probably because he never shook the sort of bad habits that made him the primary culprit on that long run a couple of spring games ago where Robinson never figured out the WR he was trying to check was blocking him. He'll have to sit out a year and then he'll have one to play if he doesn't go I-AA. He probably should have moved to WLB immediately upon his arrival at M.
Jones meanwhile was not a touted recruit and never saw the field even when Michigan was scrambling at the WLB spot in 2011. His main on-field contribution was to pick up a dumb personal foul against OSU last year. (Off the field, he provided many opportunities for people to say WHO? because of a rapper who is now ironically forgotten, or at least would be if his song wasn't about his name.)
The main downside is if their absence forces Michigan to play a couple kids who otherwise would have redshirted on coverage teams and the like. If Ben Gedeon plays despite not projecting to the two deep at MLB either this year or next, I'll be a little cheesed off.
Michigan now has a slot for a hypothetical fifth-year QB transfer, say Arkansas transfer Brandon Mitchell. Mitchell who is reported to be considering Michigan along with NC State and three smaller schools. As per usual these guys are leaving to play, though, so unless Michigan can sell Mitchell on a slash role a la Gardner he'll probably head to a place he can at least compete for the starting QB job.