The 2014 Ohio State Buckeyes were one of the toughest run defenses in the country last year. Ask Melvin Gordon who didn't top 100 yards or score in that game. Alabama's talented group of running backs were all held below 100 yards. In fact, everyone's post draft crush T.J. Yeldon had only 47 yards in that game. Only two running backs in the country really had success against that defense: Tevin Coleman and David Cobb.
David Cobb had the second best performance of the year against the vaunted defense (based on rushing yards) with 145 and tied with Tevin Coleman with three rushing touchdowns.
This wasn't Cobb's only big game this year, the Minnesota product had seven games with more than 100 yards rushing, and four of those he was at or over 180 yards. The most impressive of all of these games may have been his 200 all-purpose yard game against Michigan who was the 9th best run defense in the country at the time. He was the key to winning that game and without him Michigan loses that game badly.
While Draft Breakdown didn't have the Ohio State game available, here is one of my favorite gifs to describe how Cobb plays.
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That is how ridiculous Cobb makes people look when they try to arm tackle him. #59 just went for a ride.