Wes Welker has passed concussion protocol and could be back on the field as soon as Sunday if the NFL signs off on a new drug policy approved by the players' union. Representatives of the NFL Players Association approved the comprehensive new policy Friday that includes implementation of testing for HGH and an increase in the threshold for testing positive for marijuana. If the league approves the agreement - an NFL spokesman said late Friday night there were unresolved issues and it was not a done deal - the Broncos' slot receiver could be eligible to play when the Kansas City Chiefs visit Denver on Sunday. The Broncos have an opening on their 53-man roster after shifting wide receiver Nathan Palmer to the practice squad this week. More...