Minnesota Vikings quarterback Josh Freeman has a concussion.
So, it's back to Christian Ponder for Sunday night's game against the Green Bay Packers.
"Looking at the history of guys who have concussions on a short week that are able to at least get cleared for Sundays, we'll have to proceed as if [Freeman]'s not going to make it," Frazier told reporters.
Ponder lost the starting job after injuring his ribs then Matt Cassel started before Freeman was acquired.
The lack of durability is affecting the Vikings' cause.
"It's important," Frazier said. "That quarterback position, you want to know who's going to be lining up, week-in and week-out. But that's the circumstance where we are, and Christian will do a good job for us on Sunday night."
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.