Although the Ravens doled out a lot of big hits in Thursday's 48-17 thrashing of the Jacksonville Jaguars, they took some lumps of their own in the secondary.
Second-team safety Sean Considine, who signed as a free agent from the Arizona Cardinals, has a concussion and another second-teamer, Emanuel Cook, had his season ended by a broken right leg.
"This one we'll have to look at really hard," Harbaugh said of Considine, who had a head injury in last week's loss to the Detroit Lions that wasn't deemed severe.
Cook was injured on kickoff coverage when teammate Anthony Allen crashed into his leg. Cook had to be carted off the field and knew his injury was major as he pounded his fist in disappointment.
"One of my favorite guys broke his leg," Harbaugh said. "He's had a really good camp. He's one of our most valuable special teams guys from last year. That was tough."