Mack is the best center prospect to come out of the college ranks in quite a while. An excellent pass blocker with good balance and technique, he is not fast (timed at 5.15 in the 40) or explosive but knows where to be. Despite his lack of speed, Mack is quick inside; he moves well inside the tackle box. He has great balance and is a natural at pulling and trapping, able to find and engage defenders on the second level. Mack takes good angles and is an able cut blocker. He has been relatively injury free for much of his college career and is an outstanding leader who commands respect inside the huddle. On the downside, Mack is not the best run blocker out there. Although he understands the position and has good sealing technique, he does not sustain his blocks well. He is also somewhat of an ineffective drive blocker and has below average footwork. A three time All American at Cal, Mack certainly has the pedigree NFL teams covet. He is a very athletic and active inside lineman who could be moved to guard at the next level. -- A mid-to-late first rounder who has the talent and desire to develop in to a top notch NFL guard.