Tom Brady doesn't think the Patriots will be able to replace wide receiver Wes Welker. Welker suffered what is believed to be a season-ending knee injury on Sunday against the Texans. "You can't replace him, there's no doubt about that," Brady said Monday in an interview on WEEI. "There's nobody that can substitute in for Wes and think that they're going to be Wes. He is everything you ask for. "We've got to move on and we've got to go out there and play, and everyone I think in different areas has to pick it up. I have to play better, Julian [Edelman] has to play better, Randy [Moss] has to play better, the offensive line, running backs, tight ends, we all have to do more. I think that's the commitment we have to make to one another."