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Out of all of the positions on this list, this one is probably the most important. Plus, it's the one Michigan looks to have the biggest advantage in.
Michigan's linebacking corps is arguably the biggest strength on their team; there are four guys capable of starting, but obviously only three will be able to. Whoever the odd man out is, though, might as well be listed as a co-starter.
Jake Ryan will only continue to get better and better, as will Desmond Morgan as he gains more experience. However, the real intrigue surrounds the two youngsters, Joe Bolden and James Ross. Both will be sophomores and both saw plenty of action last year; only one will likely start, though.
OSU, on the other hand, has somewhat of a mess at linebacker. Zach Boren, Etienne Sabino and Storm Klein have all graduated from last year's team.
Ryan Shazier is obviously back, but there's nothing but questions beyond him. Curtis Grant has been a complete bust in his career to this point, so it's hard to depend on him. Josh Perry may start, but he is still young and mostly inexperienced.
Plus, depth is a big issue. If Grant or Perry struggles, David Perkins, Camren Williams and Luke Roberts look to be next in line, but none have any experience.
Michigan has a wide advantage in this position that is oh so important.