Cowboys defensive coordinator Rob Ryan says he isn't going to discuss Patriots wide receiver Wes Welker, who leads the NFL in receiving yards heading into Sunday's game between Dallas and New England. "I'm afraid to comment on wideouts," Ryan said. "Apparently, I don't know anything." Ryan was referring to the regrettable bulletin board material he provided to the Lions when he insinuated Dez Bryant and Miles Austin were better receivers than Calvin Johnson. He was forced to eat his words when Johnson hauled in two touchdown passes, including the game-winner in Detroit's 34-30 Week 4 victory in Dallas. "I'm not going to compare anybody anymore, even though Dez Bryant did catch two TD passes, same as the other guy," Ryan said. "But I've given that up."