
SANTA CLARA – Running back Shaun Draughn, who is considered day-to-day with a knee sprain, did not practice Wednesday as the 49ers began on-field preparations to face the Detroit Lions.
Draughn, the 49ers’ second-leading rusher on the season with 263 yards, left the 49ers’ 24-14 loss to the Cincinnati Bengals in the first half and did not return. An MRI examination on Monday revealed no significant damage, a source said.
Outside linebacker Aaron Lynch was cleared for full practice after sitting out two games with a concussion he sustained Dec. 6 against the Chicago Bears.
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However, Ahmad Brooks, the team’s starter on the other side, did not practice due to shoulder and back conditions, the team reported.
Offensive lineman Marcus Martin did not practice due to a concussion he sustained Sunday. He wore dark glasses inside the 49ers’ locker room on Wednesday. Martin started the 49ers’ first 13 games at center. He started at right guard against Cincinnati.
Wide receiver Torrey Smith did not practice due to back and foot issues. Smith sat out two practices last week but played in the 49ers’ game against the Bengals.
Guard Alex Boone (knee) and linebacker Michael Wilhoite (ankle) did not practice and are not expected to be available for Sunday’s game.
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Here are the participation reports from both teams from their Wednesday practices:
49ERS
Did not participate
G Alex Boone (knee)
LB Navorro Bowman (shoulder, finger)
LB Ahmad Brooks (shoulder, back)
RB Shaun Draughn (knee)
C Marcus Martin (concussion)
WR Torrey Smith (back, foot)
LB Michael Wilhoite (ankle)
Limited participation
DT Quinton Dial (shoulder)
CB Dontae Johnson (ankle)
T Joe Staley (knee)
Full participation
DT Arik Armstead (shoulder)
LB Eli Harold (shoulder, hamstring)
LB Aaron Lynch (concussion)
T Erik Pears (knee)
LIONS
Did not participate
S Glover Quin (concussion)
Limited participation
LB Josh Bynes (foot)
WR Calvin Johnson (ankle)
DT Haloti Ngata (neck)
T Michael Ola (knee)
DT Caraun Reid (ankle)
G Larry Warford (quadricep)