Gus or Javes?

It is not at all clear to those of us who have not seen practices who has the inside track on the starting center job. For the time being, I assume it is Michael Javes, if for no other reason than Gus Leeper's health problems at the start of the season give him a head start. However, Gus' game is probably more versatile than Michael's (he has an outside shot). So in the long term, who knows?