The San Francisco 49ers are preparing for their Week 15 contest against the Seattle Seahawks on Sunday at Levi's Stadium in Santa Clara, California.

Thursday injury notes:

  • Safety Jaquiski Tartt and linebacker Mark Nzeocha, who were both inactive against the Denver Broncos, did not practice on Wednesday or Thursday.
  • Defensive end Cassius Marsh, who is in the concussion protocol this week, practiced in a blue no-contact jersey after sitting out Wednesday's session.
  • Cornerback K'Waun Williams, who was inactive against the Denver Broncos and did not practice on Wednesday, was on hand for Thursday's session but limited.
  • Defensive lineman Ronald Blair and wide receivers Marquise Goodwin and Dante Pettis were new additions to the injury report. All three were limited during Thursday's practice.

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

San Francisco 49ers Thursday Practice

Did Not Participate In Practice
LB Mark Nzeocha (groin), S Jaquiski Tartt (shoulder)

Limited Participation in Practice
DE Ronald Blair (groin), RB Matt Breida (ankle), WR Marquise Goodwin (calf), DE Cassius Marsh (concussion), WR Dante Pettis (foot), LB Malcolm Smith (Achilles), CB K'Waun Williams (knee)

Full Participation in Practice
DT D.J. Jones (back), C Weston Richburg (knee), T Joe Staley (not injury related), G Laken Tomlinson (hip)

Seattle Seahawks Thursday Practice

Did Not Participate In Practice
SS Maurice Alexander (concussion), DE Frank Clark (elbow), G/T D.J. Fluker (hamstring), RB Rashaad Penny (knee), DT Jarran Reed (oblique), DT Shamar Stephen (foot)

Limited Participation in Practice
WR Doug Baldwin (hip), DE Dion Jordan (knee), FB Tre Madden (chest), FS Bradley McDougald (knee), LB K.J. Wright (knee)