From #49ers coach Kyle Shanahan:

Will not practice
QB Trey Lance (knee)
DT Javon Kinlaw (knee)
LT Trent Williams (elbow/ankle)

Limited
QB Jimmy Garoppolo (calf)-should be a full-go once he shows he’s OK.

LB Marcell Harris (thumb) on his way back from doctor and could practice.

— Matt Maiocco (@MaioccoNBCS) October 20, 2021