Found this comment on Niners Nation, thought it was a pretty good one. My guess would be is that Martin is eventually destined for guard along with Thomas with this guy fighting with Kilgore for the starting spot at C, which would indicate a plan to move more fully towards a zone blocking scheme.
Commitment to Zone Blocking... You absolutely need a guy like this at center to run a ZBS at a high level. A smaller smarter player like Chris Myers whose speed of recognition and quickness and good use of angles lets him combo and get to the second level. Martin is more of a gap scheme center, who makes a better ZBS guard. Probably not a move that pays immediate dividends but a step in the right direction to better match personnel with scheme.
[ Edited by Phoenix49ers on Sep 5, 2015 at 10:01 AM ]