Yahoo Sports
Branch, who entered the draft early after receiving a first-round grade from the NFL Advisory Committee, was a projected top-10 choice until he hit the postseason. His grade fell as a result of average workouts, and some questions about his toughness in the middle and his ability to be a true playmaker in the NFL.
At times, he appears to be less of the dominant interior defender that can take up space and fight through double teams and seems more another disappointing underclassman that has riddled this position in recent years. He was a little out of shape at his pro day workout as several scouts noted that he was out of breath and lacked explosiveness in his drills. To his credit, he has not made any excuses, but there is now more of a consensus that he could need a lot of motivation to reach or play his best.
The lack of a true nasty streak and the fact that he is better at receiving information "live" than in the classroom also has some position coaches fearing that he could be a bit of a high rep learner, which slows down a young player's progress. He's too big and naturally skilled to slide much past the first 15 picks, but is now seen more as a top-20 guy
Walter Football Site
Looked very out of shape and sluggish in drills. At one point, Alan Branch looked like he wanted to quit. Could be out of the top ten and into the teens