Patrick Willis has struggled to make the same kind of impact he has in past seasons. "I remember there were times when I could just stack and run and ... most of the times you never get touched," Willis said Wednesday. "Now, you're starting to feel it from every angle. They say, 'We have to put a hat on one of the best players at all times,' and they're doing that. "It's been a little frustrating not having the big plays that I've wanted to have."