Samuel (foot) was spotted sprinting hard on a side field at Wednesday's practice, Matt Barrows of The Athletic reports.
Per Barrows, the wideout had "his most intense workout thus far with change-of-direction exercises." The report also notes that Samuel is pushing to be ready for the 49ers' Sept. 13 season opener against the Cardinals, and the wideout's activity Wednesday offers some concrete evidence that he could meet his goal.