SANTA CLARA -- All-Pro defensive tackle Justin Smith, who sat out most of the second half of Sunday night's game against the New England Patriots with an unspecified injury to his left elbow, was a spectator Wednesday at 49ers practice.
Earlier, 49ers coach Jim Harbaugh said Smith would play Sunday night against the Seattle Seahawks "if it's humanly possible."
And will it be humanly possible?
"We'll see," Harbaugh said. "We'll see how he feels today and tomorrow."
Smith enters this week with a streak of 185 consecutive starts. The only game he has missed in his 12-year career was his first game as a member of the Cincinnati Bengals due to a contract dispute.
The 49ers had four other starters who wore black jerseys to signify they were off-limits to contact during practice: Outside linebackers Aldon Smith and Ahmad Brooks, cornerback Tarell Brown, and wide receiver Mario Manningham.