EL SEGUNDO, Calif -- Coach Jim Harbaugh said Monday that running back Najee Harris is cleared to participate in full-contact practice, another sign that Harris could play in the Chargers' season opener Friday against the Kansas City Chiefs in Brazil.

Harbaugh was still noncommittal, however, on Harris' status for Friday's game: "There's a possibility," he said. "He's looked really good in practice."

Harris injured his eye in a Fourth of July fireworks mishap, which landed him on the non-football Injury/illness list ahead of training camp.

Harbaugh also said that wide receiver Quentin Johnston cleared concussion protocol. Johnston suffered a frightening concussion in the Chargers' second preseason game against the Los Angeles Rams , which left him motionless on the field for seve

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