Pro Bowl Dallas Cowboys linebacker Sean Lee practiced all week and is expected to start Sunday.
After missing the last two games with a hamstring injury, All-Pro left tackle Tyron Smith (back) was a full participant in practice Thursday and Friday after missing Wednesday's session. Smith is also expected to start.
Per the Dallas Morning News, rookie cornerback Chidobe Awuzie did not practice this week and has been ruled out for Sunday. The second-round pick has been dealing with a hamstring injury since training camp. He played in the season opener and started Week 2, but he re-aggravated the injury and missed the following two weeks. Awuzie returned to play against Green Bay but suffered another setback.
Veteran linebacker Justin Durant is questionable for the 49ers games after being limited Friday because of a groin injury. Durant was a full participant Wednesday and Thursday.