In somewhat unexpected news, Ty Isaac has chosen to commit to USC over Michigan. The Wolverines had seemed to lead for the five-star running back for some time, but recent trips to USC obviously did a lot to close (and reverse) that gap. In hindsight, Isaac's announcement that he was done with visits -- after a trip to USC -- should have been a clear signal that things weren't going to end well. So it goes.
Michigan still has two talented running backs in the 2013 class (Wyatt Shallman and Deveon Smith) and is still recruiting others as well, so all is not lost. However, this is a blow to the blistering momentum that Michigan had gained early in the recruiting cycle and marks the second high profile recruit in a row that has gone elsewhere with Michigan in his top two.
Still, 18 commits and the number one class so far should help you sleep at night.