Darren Urban updates the injury situation:

• Al Johnson had to have surgery to clean out his knee but they hope that he'll be back by the start of the regular season. Personally I wouldn't hold my breath on that one and I'd be pretty surprised if Lyle Sendlien isn't the starting center when the Niners come to town on September 7th. It'll be the second time this offseason that Big Al's knee has been under the knife in the past couple of months.
• Whiz said that Scott Peter's injury is believed to be serious and he's not expected back anytime soon. They'll have to look at signing another center pretty quickly unless they feel comfortable with Hercules Satele as the primary backup. I'd keep an eye out on LeCharles Bentley's name to pop up in Arizona pretty quickly. Or is there another center out there that catches your eye?
• The minor tweaks and pulls are starting to mount and the list now includes Doucet (hamstring) and Haggans (groin) in addition to the list of guys that are already limited. As a precaution several veterans will not practice this afternoon including A-dub, Okeafor, Berry and Edge.
  
• Still no word on Boldin's MRI results but they did say he'd test it again this afternoon to see if it's getting better.