San Francisco 49ers star Vernon Davis made progress Tuesday even as he was limited in practice.The tight end is trying to bounce back -- in a short work week -- from a hamstring injury that kept him out of Sunday's 27-7 loss to the Indianapolis Colts. The 49ers play at St. Louis on Thursday. San Francisco offensive coordinator Greg Roman said Tuesday the team expects Davis to be a game-time decision. The fact that the eighth-year pro got some work Tuesday is significant; Davis didn't practice all last week.