Offensive right tackle Anthony Davis still is experiencing post-concussion symptoms, and his availability for Thursday’s game is up in the air, 49ers coach Jim Harbaugh said today. Davis suffered a concussion at the end of the team’s Nov. 16 game against the New York Giants and did not play Sunday against Washington.
A player who had a concussion must show no symptoms at rest and after exertion to be cleared to play in a game.
Jonathan Martin filled in Sunday and will make his seventh start of the season if Davis can’t play against a Seattle Seahawks defense that ranks fourth in the NFL against the pass but has only 16 sacks (29th). Against Washington, Martin allowed a sack and two hurries.
Meanwhile, the 49ers played most of Sunday’s game without tight ends Vance McDonald (hip) and Derek Carrier (foot). Harbaugh said the team could activate blocking tight end Garrett Celek, who began the season on the physically unable to perform list because of a back injury.
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Harbaugh also said linebacker NaVorro Bowman, who is eligible to practice with the team, instead will continue with his rehabilitation routine. Bowman met last week with the surgeon who repaired his damaged ACL in February, Dr. James Andrews.
Bowman has not suffered a setback, but it appears he won’t play this season. The 49ers have two more weeks either to add Bowman to the 53-man roster or place him on injured reserve, ending his season.
Read Matt Barrows’ blogs and archives at www.sacbee.com/sf49ers.