The last time we saw Derek Carr on the field, he was barely able to walk. That was a little over a week ago when the Raiders played the Dolphins in week four in London. At the time, Carr described the injury as a high ankle sprain and a sprained MCL which for most positions would mean a fairly lengthy absence.
The rookie quarterback also seemed confident he would be able to go this week when the Raiders face the Chargers at home. He took the practice field and practiced with his teammates which lends some credence to Carr's confidence in his ability to go this week.
The Raiders tweeted out this photo of Carr practicing with the team today.
Media on hand also said Carr didn't look limited by his injury. Quarterbacks aren't required to be quite as mobile as say a running back who would likely be out a good four weeks with similar injuries. However, Carr is typically pretty fleet of foot and new head coach Tony Sparano is known for liking to throw in a lot of read option plays in the offense and Carr would likely not present much of a threat in that area while hampered by an injury.
If Carr were unable to go, the Raiders would have turned to Matt Schaub.