Chargers running back Najee Harris isn’t back to practice, but he took another step in his return from an eye injury. On Tuesday, Harris ran and participated in drills with a football off to the side with an athletic trainer, Kris Rhim of ESPN reports.

Harris, who was injured in a July 4 fireworks accident, landed on the non-football injury list before training camp. Since Aug. 2 — and before Tuesday — he had only walked laps with a helmet while wearing a weighted vest.

Harris’ agent, Doug Hendrickson, said Harris has a “superficial eye injury” and expects the one-time Pro Bowler to be ready for the season.

Coach Jim Harbaugh has been noncommittal about Harris’ availability for Week 1.

Harris posted a photo on social media last week that showed his left eye completely shut, but Har

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