Raiders quarterback Derek Carr was forced out of Week 4 against the Dolphins in London with an apparent left knee injury.
Carr took a tough hit to the knee by Jelani Jenkins while on the run in the third quarter. He limped off the field and was replaced by Matt McGloin. Carr completed 15 of 25 passes for 132 yards, with a touchdown and an interception.
According to the NFL Network, Carr went the locker room for X-rays. His return is questionable.