Raiders receiver Javon Walker had knee surgery last month and told the team about it just a few days ago, coach Tom Cable said.
That's why Walker is not practicing at today's mandatory minicamp. Cable admitted it's "uncommon" for players to undergo surgery like this without informing the team until weeks later. He did not elaborate very much, only saying it was probably the right thing to do (have the surgery, not necessarily the secret).
Cable said Walker's ankle is fine. He had season-ending ankle surgery midway through last season.
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