Once thought to be the Chiefs’ leading candidate, now there is no doubt: Pioli is their man, according to an NFL source. Perhaps more important, Pioli’s interest in the Chiefs and a potential new career challenge has grown. All that stands in the way is hashing out a contract agreement, or perhaps a late pitch from the Patriots (who lost offensive coordinator Josh McDaniels to the Broncos yesterday as head coach), or a last-minute change of heart from Pioli. All scenarios remained in play as of early last night, but as reported in yesterday’s Globe, the intensity of talks between Pioli and the Chiefs has increased within the last 24-48 hours. Word out of Kansas City continues to be that the possibility of the sides coming together is picking up momentum. The key has been the comfort level between Pioli, Hunt, and team president Denny Thum.