The San Francisco 49ers are preparing for their Week 13 contest against the Baltimore Ravens on Sunday at M&T Bank Stadium in Baltimore, Maryland.

The media was not allowed to observe Thursday's practice because of the Thanksgiving holiday.

WR Dante Pettis reportedly left practice on Wednesday with what looked to be a left knee injury.

TE George Kittle and OT Joe Staley, who did not practice on Wednesday, were limited on Thursday. It was Staley's first practice since having surgery on the fractured finger suffered during Week 10 against the Seattle Seahawks.

Below are Thursday's practice participation reports for both the 49ers and Ravens, which were provided by the 49ers Communications staff.

San Francisco 49ers Thursday Practice

Did Not Participate In Practice
DE Dee Ford (quadricep, hamstring), WR Dante Pettis (knee)

Limited Participation in Practice
RB Matt Breida (ankle), TE George Kittle (knee, ankle), WR Deebo Samuel (shoulder), WR Emmanuel Sanders (ribs), T Joe Staley (finger)

Full Participation in Practice
K Robbie Gould (right quadricep), DT Jullian Taylor (jaw)

Baltimore Ravens Thursday Practice

Did Not Participate In Practice
T Orlando Brown (illness), RB Mark Ingram (not injury related), LB Matt Judon (ankle), DT Domata Peko (knee), S Earl Thomas (not injury related), DT Brandon Williams (not injury related)

Limited Participation in Practice
TE Nick Boyle (ankle), G Bradley Bozeman (ankle), DT Michael Pierce (ankle)