The Detroit Lions promoted cornerback Chris Greenwood from the practice squad with rookie cornerback Darius Slay ruled out with a knee injury.
Greenwood was drafted in the fifth round by Detroit last year.
He was with the Dallas Cowboys before being released and re-signed by Detroit.
The Lions cut wide receiver-kick returner Micheal Spurlock.
Follow me on Twitter: @RavensInsider
Aaron Wilson covers the Ravens for The Baltimore Sun.
Check out our partners at TiqIQ for the best deals on all games on the 2014 NFL schedule.
SEP 17 Jesse Lawrence
Jesse Lawrence of TiqIQ takes a look at the hot tickets this weekend.
SEP 16 Joel Corry
After registering 19 sacks in 2013, the St. Louis pass rusher cashes in big.
SEP 16 Jeff Fedotin
First-place squad could start 5-0.