Tennessee Titans linebacker Colin McCarthy may need season-ending shoulder surgery.
McCarthy has undergone tests and will get a second opinion, according to the Tennessean.
The injury was called "significant" by coach Ken Whisenhunt.
McCarthy is a former fourth-round draft pick.
Wesley Woodyard is the starter.
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 30 Jesse Lawrence
Jesse Lawrence of TiqIQ takes a look at the week's action
SEP 30 Joel Corry
A look at the players coming up big and small at the most important of times.
SEP 29 Jeff Fedotin
Better quarterback play has given Green Bay the edge.