Saints left tackle Kelvin Banks was carted off the field in the third quarter Sunday.
With 2:20 remaining in the quarter, Banks got rolled up on by Ravens pass rusher Trey Hendrickson as Mike Green sacked Saints quarterback Tyler Shough.
Banks injured his left ankle, and the Saints have ruled him out.
Asim Richards has replaced Banks at left tackle.
The Saints ruled out cornerback Martin Emerson with a shoulder injury.
The Ravens lead 17-9.
