SANTA CLARA -– Defensive tackle Quinton Dial, who started the 49ers’ first 15 games, sat out Wednesday’s practice with a back strain that forced him out of Sunday's game against the Detroit Lions.
The 49ers on Friday ruled out four starters, including running back Shaun Draughn, from playing in Sunday’s game against the Detroit Lions.
Offensive lineman Marcus Martin, who started the 49ers’ first 14 games, sat out another day of practice Thursday due to a concussion he sustained on Sunday.
SANTA CLARA – The 49ers switched it up in their defensive backfield on Sunday, as Dontae Johnson replaced right cornerback Kenneth Acker for most of the team’s snaps in their base defense.
CLEVELAND – During the offseason program and training camp, the 49ers viewed Marcus Martin as a guard.