McCaffrey (calf) is in uniform for the portion of Tuesday's practice open to the media, Matt Barrows of The Athletic reports.
The 49ers' first official practice report of Week 1 won't be released until Thursday, so it's unclear whether McCaffrey is practicing in full or on a limited basis Tuesday. Nonetheless, it's encouraging to see the star running back participating in any capacity. A calf injury forced McCaffrey to miss all of the preseason and most of training camp, though he did resume working out on a side field in mid-August. San Francisco seems to expect he will suit up for Monday's regular-season opener against the Jets, but backup running backs Jordan Mason, Isaac Guerendo (groin) and Patrick Taylor could benefit from increased opportunities if McCaffrey's workload is limited.