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Gates has an injured plantar fascia as well as turf toe. The Chargers didn't list the plantar fascia injury on Wednesday's injury report, the first of the week. A spokesman says it was an "oversight" and it would be added on Thursday's report.
Meantime, the Chargers have signed wide receiver Kelley Washington two days after wide receiver Craig "Buster" Davis was placed on injured reserve with a groin injury, meaning his season is over. The Chargers also have been without wide receivers Legedu Naanee and Malcom Floyd due to hamstring injuries.
The Chargers waived tackle Adam Terry to make room for Washington on the roster.