Diamondbacks manager Torey Lovullo told MLB.com on Friday that Walker (oblique) is swinging against soft-toss pitching and doing light running.

Walker, who landed on the injured list July 30, remains hopeful he'll be ready to go by the three-week mark, which is fast approaching. This coming week marks his potential return. Fortunately for Arizona, the team has covered his absence well with the addition of Josh Bell, and the Diamondbacks don't have to rush Walker back.