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Watch highlights from the San Fancisco 49ers 35-16 win over the St. Louis Rams.
St. Louis also lost right guard Richie Incognito with a strained rotator cuff just before halftime. Starting cornerback Ron Bartell was ruled out with a torn meniscus in his knee during the Rams' disastrous first half against the 49ers, who led 35-3 at halftime of their 35-16 victory. All three players will undergo MRI exams soon.
"I'm not going to come to any conclusions until we get the MRI on them," Rams interim coach Jim Haslett said.
Pace missed much of the previous two seasons with injuries, including all but one game in 2007 with a shoulder injury. He has missed just one of the Rams' 10 games this season, but he went to the locker room during the second quarter against San Francisco.
Bartell, a fourth-year pro, started eight of the Rams' first 10 games this season. Incognito missed the Rams' final eight games last year with a dislocated kneecap.
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Pace was replaced by versatile backup Adam Goldberg, while Brett Romberg replaced Incognito.
Linebacker Pisa Tinoisamoa injured his ankle, and fellow linebacker Will Witherspoon hurt his leg. Haslett didn't think either injury was serious.
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