Brett Keisel's short-term memory is a little hazy. Actually, his long-term memory is clouded, too, at least when it comes to the New England Patriots. The Pittsburgh defensive end isn't quite sure how many times Tom Brady has beaten the defending AFC champions. Is it four? Five? All Keisel knows is, whatever the number is -- six, actually -- it's too many. He also knows he's not dwelling on it heading into their showdown Sunday at Heinz Field. "I really haven't thought about what they've done in the past, honestly," Keisel said. Good idea. Read more: http://espn.go.com/nfl/story/_/id/7155051/pittsburgh-steelers-fear-new-england-patriots-defeats