Rob Ryan on Wes Welker: “I’m afraid to comment”

Cowboys defensive coordinator Rob Ryan learned his lesson about giving bulletin-board material to opposing wide receivers when he opened his mouth about Calvin Johnson. So when asked about Sunday’s game against the Patriots and receiver Wes Welker, Ryan hesitated. “I’m afraid to comment on wideouts,” Ryan told the Star-Telegram. “Apparently, I don’t know anything.” Ryan…