BIO: Four-year starter that saw extensive action at guard and left tackle.
POSITIVES: Powerful blocker that overwhelms defenders when properly conditioned. Strong, stays square, keeps opponents in front of him and gets movement in run blocks. Anchors in pass protection and an immovable force opposing lineman have difficulty getting past. Jolts opponents at the point with good arm punch and displays the skills to adjust or slide laterally.
NEGATIVES: Not effective blocking in motion and lacks balance as well as body control. Poorly conditioned in the past and has been upwards of 375 pounds, which reportedly cost him his starting job as a junior.
ANALYSIS: When in shape and focused on the task at hand, Clarke is potentially the best guard in this draft. Dominates both a run blocker or pass protector and displays a surprising variety of skill. Will be a productive starter at the next level if he keeps his weight in check and works on the details and finer points of his position.