Brown was blocking when middle linebacker Will Witherspoon came by on a blitz and sacked quarterback Drew Brees. Brees was knocked backward onto the back of Brown's lower leg, leaving Brown contorted in an awkward position for several seconds.
Brown was carted to the locker room for treatment.
It was the second knee injury this year for the former Pro Bowl pick, who missed most of training camp with a bone bruise on his right knee.
Copyright 2007 by The Associated Press