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.
The Buffalo Bills have signed two 49ers free agents within the past two days.
After signing wide receiver Rod Streater on Wednesday, the Bills announced the signing of linebacker Gerald Hodges on Thursday.
The 49ers acquired Hodges in a 2015 trade with the Minnesota Vikings for center Nick Easton and a sixth-round draft pick. Hodges started 12 games last season and ranked second on the team with 92 tackles.
Hodges left the 49ers shorthanded for a late-season game against the Atlanta Falcons when he violated team rules. Then-coach Chip Kelly did not disclose the nature of Hodges infraction. Hodges offered no explanation or apology.
The 49ers entered the game against the high-powered Falcons with just two healthy inside linebackers due to Hodges’ deactivation. Starter Nick Bellore sustained an elbow injury on the third play of the game, and the 49ers were forced to use safeties Antoine Bethea and Vinnie Sunseri, and outside linebacker Ahmad Brooks at various points of the game.
The 49ers showed no interest in re-signing Hodges as a free agent.
Streater, a five-year NFL veteran, saw action in all 16 games last season after being acquired in a trade with the Kansas City Chiefs in September. He caught 18 passes for 191 yards and two touchdowns.
It was Jim Harbaugh's first season as head coach of the 49ers.
The 4-1 49ers were in Detroit and scored 10 points in the final 5:29 to beat the Lions 25-19.
An excited Harbaugh got a little too agressive during his postgame handshake with Lions coach Jim Schwartz. The two had words for each other and had to be separated.
Six years later, Harbaugh took the blame for what happened and said that he and Schwartz have patched things up.
"I went in too hard on that, too aggressive on the handshake. I've since changed that. Not doing that anymore. Can't blame him. I went in too hard. And you respect him for taking exception. We've talked, and we're good. We're back to friends. There is a protocol in a postgame handshake. I've been there as the winner. I've been there as loser. You just, 'Hey, nice game,' then go celebrate. Premature celebration there, in the wrong," Harbaugh said Tuesday on Barstool Sports' Pardon My Take podcast.
Harbaugh sounds like he's learned his lesson from that incident with Schwartz.
"The postgame handshake isn't the place for anything. If you're bitter, than change the I to an E. Don't get bitter, get better. Nothing's really changing at the postgame handshake. Just professionally shake hands and go on your way," Harbaugh said.
Harbaugh moved on from the 49ers to coach the Michigan Wolverines. Schwartz coached the Lions through the 2013 season and currently serves as the defensive coordinator for the Eagles.