Two days after missing practice in what was described as a day of rest and "not injury-related," 49ers linebacker Dre Greenlaw landed on the team's official injury report for Sunday's game against the Cleveland Browns.
The fifth-year pro is listed as questionable for the Week 6 road game with a hamstring injury. Greenlaw was held out of practice Thursday, and he was a limited participant on Friday.
"It was during our walkthrough, he just did something and didn't feel comfortable with it," Shanahan told reporters Friday regarding Greenlaw's status. "Now we're being safe and we'll see how he feels tomorrow."
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Backup running back Elijah Mitchell, who has missed the past two games with a knee injury, also is listed as questionable for Sunday's game in Cleveland.
Mitchell returned to the practice field Thursday for the first time since sustaining the injury.
Left guard Aaron Banks (shoulder) was a full participant in Friday's practice and is cleared to play.
San Francisco 49ers
For the Browns, they'll be without their starting quarterback as Deshaun Watson was ruled out with a shoulder injury. Quarterback P.J. Walker was promoted from the practice squad and will start against the 49ers ahead of rookie Dorian Thompson-Robinson.
Browns injury report:
QB Watson (shoulder) - OUT
G Joel Bitonio (knee) - OUT
WR Cedric Tillman (hip) - OUT
TE David Njoku (face, hand) - QUESTIONABLE
C Ethan Pocic (chest, knee and foot) - QUESTIONABLE