Should player exits concern Michigan?

Attrition is a part of college football, especially at this time of year, but at what point does it become a concern?

Freshman tight end Chris Barnett is the third player to leave Michigan this week, joining junior wide receiver Je'Ron Stokes and freshman offensive lineman Tony Posada. Barnett made his pledge to new Wolverines coach Brady Hoke after he took over in January. A third Hoke recruit, linebacker Kellen Jones, left the Wolverines and enrolled at Oklahoma.

When examined on an individual basis, none of these departures hurts Michigan too much. And each player has his own reasons for leaving a program. These players didn't figure to be big parts of the plan for 2011, although Barnett could have been a factor in 2012.

If Rich Rodriguez were still coaching the Wolverines, he'd be getting criticized for player departures. Hoke shouldn't be held to a completely different standard.

It will be interesting to see if this is just a brief wave of departures, or if other players, particularly those who committed to Hoke and his staff, decide to leave.