The San Francisco 49ers are preparing for their Week 4 contest against the Los Angeles Chargers on Sunday at the StubHub Center in Los Angeles, California.

Three of four starters from the 49ers' defensive backfield missed Wednesday's practice. The situation got a little better on Thursday with safety Adrian Colbert (hip) back in uniform. Safety Jaquiski Tartt (shoulder) missed his second straight practice of the week.

Veteran cornerback Richard Sherman (calf) continues to get around with a walking boot over his left foot. He told reporters on Thursday that he does not expect to play in Sunday's game against the Chargers. When can fans expect to see Sherman back on the field?

"I don't think it's been determined until I go out there and give it a shot, and we work through it," Sherman answered. "I think I'll be missing this one, but I don't think we know much beyond that."


Other injury notes from Thursday:


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

San Francisco 49ers Thursday Practice


Did Not Participate In Practice
G Joshua Garnett (toe), CB Richard Sherman (calf), S Jaquiski Tartt (shoulder)

Limited Participation in Practice
S Adrian Colbert (hip), RB Alfred Morris (knee), G Mike Person (knee)

Full Participation in Practice
RB Matt Breida (knee), WR Marquise Goodwin (quadricep), T Joe Staley (not injury related), CB Ahkello Witherspoon (ankle, hip)


Los Angeles Chargers Thursday Practice


Did Not Participate In Practice
WR Keenan Allen (knee, tooth), T Joe Barksdale (knee), DE Joey Bosa (foot), LB Kyzir White (knee)

Limited Participation in Practice
WR Travis Benjamin (foot)

Full Participation in Practice
T Russell Okung (knee), RB Derek Watt (thumb)

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