Raiders wide receiver Javon Walker had knee surgery sometime last month. A few days ago, he finally let team officials in on the secret. That explains why Walker is not practicing at the team's mandatory minicamp, which started Friday with two-a-days. "We just found out about it," Cable said. "Yeah, it is a little bit uncommon but we're aware of it now and it was probably the right thing to do and get it cleaned up." Source: SanFrancisco Chronicle
