Domanick Davis continues to struggle with pain in his knee and it is becoming increasingly clear that he may not be all that effective this season. Antowain Smith is there, but he’s not very explosive. Vernand Morency and Wali Lundy are next in line to start if Davis can’t go. Lundy looked particularly good in the Texans’ first preseason game…Clinton Portis has a separated shoulder, but it’s unclear how much time he’s going to miss. His Antsports’ ADP of 1.04 will surely take a beating until he returns to the field. If Portis is out for any extended time, look for Ladell Betts to be very productive in Al Saunders’ offense…Curtis Martin is still being held out of practice, and it looks more and more that he might be out for the season. The Jets have Cedric Houston, but they’ve been inquiring about the availability of several backs around the league, including Tennessee’s Chris Brown…Mike Shanahan has anointed undrafted rookie Mike Bell as the #1 RB for the time being, moving Ron Dayne to #3 after Tatum Bell. By most accounts, Dayne was having a very good camp, but it appears that Shanahan is impressed by M. Bell, at least for now. Every year, Denver’s running back situation is dicey, so it’s best not to commit a high pick on any of these guys…LenDale White spat in the face of Titans’ safety Donnie Nickey. It’s bad enough to spit at your opponent, but it’s far worse to spit at a teammate you have to play with for an entire season. Maybe White’s personality was the reason he dropped so far in the draft…Philip Rivers went 15 for 21, throwing for 169 yards in the first half in the Chargers’ win over Green Bay. Anyone worried about the effect of the departure of Drew Brees on LaDainian Tomlinson and Antonio Gates has to feel good about Rivers’ performance.