The Miami Dolphins didn't have offensive lineman Jake Long against San Francisco on Sunday and they struggled at times to protect quarterback Ryan Tannehill. San Francisco pass rusher Aldon Smith registered two sacks in the 49ers' 27-13 victory.
"If a guy has two sacks in a game that's not good," Dolphins head coach Joe Philbin said.
The Dolphins lost Long to a triceps injury against New England last weekend and the team placed him on injured reserve on Tuesday. Long has been a regular starter for Miami since joining the franchise in 2008. He started all 12 games prior to Week 14, he started 14 games last season and he has made 74 starts over the course of his Dolphins career.
The Dolphins were limited to 94 yards rushing by San Francisco, but they did average more than four yards per carry. They'll try to bounce back from this defeat when they take on Jacksonville next weekend.