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McCaffrey (calf) increased his activity level on the side field at practice Thursday and seems to be getting closer to a return, Nick Wagoner of ESPN.com reports.

McCaffrey also ran some half-speed routes on the side Thursday, per Matt Barrows of The Athletic. The star running back is expected to sit out all of San Francisco's preseason games while he works his way back from a calf strain suffered early August, but at this point there don't seem to be any serious concerns about his Week 1 status. McCaffrey still has over three weeks to get healthy before San Francisco's regular-season opener against the Jets on Monday, Sept. 9.

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