Williams is currently hampered by a high ankle sprain. He has played in two games this season. Stewart has not played since Week 3 with a sprained knee. Mike Tolbert, the team's third running back, is on short-term injured reserve with a hairline fracture in his leg.
Carolina averages the second-fewest yards per rushing attempt in the NFL. The Panthers are 3-2 on the season and play at the Bengals on Sunday at 1 p.m. ET.
- Dan Gartland