Christian McCaffrey

Christian McCaffrey (calf) worked out on a side field Thursday.

The San Jose Mercury News’ Cam Inman reports CMC “looked spry running, cutting, and catching passes.” Inman also offered up the following: “Insider tip: He is safe to pick No. 1 in your fantasy football draft.” In other words, the Niners aren’t sweating an issue that appears to be truly minor. For his part, McCaffrey has said he would be playing were it the regular season. 28-year-old McCaffrey is nearing common age and usage cliffs for running backs, but he’s CMC until proven otherwise.