John Harbaugh: Ravens had 'one of the greatest drives' in history of rivalry with Steelers | CBS Sports Headlines John Harbaugh: Ravens had 'one of the greatest drives' in history of rivalry with Steelers The drive included assistance from a third string quarterback ESN FeedsThis post was originally published on … Continue reading John Harbaugh: Ravens had 'one of the greatest drives' in history of rivalry with Steelers