Williams (hamstring) was a limited participant in Thursday's practice, Cam Inman of The San Jose Mercury News reports.
Williams missed practice Wednesday due to a hamstring injury he suffered Week 17 and led to a Week 18 absence. The star left tackle will have one more chance to prove himself capable of handling full practice reps ahead of Sunday's wild-card matchup against the Eagles. Williams' presence will be crucial as Brock Purdy and San Francisco's offense work to overcome Philadelphia's formidable defensive front.