A contingent of Broncos officials were the latest to study free-agent quarterback Peyton Manning working out in Durham, N.C. on Friday. Manning also is expected to work out for the Titans, though the specific day is not known, sources said. He has also hosted the 49ers in Durham for drills, sources told ESPN senior NFL analyst Chris Mortensen and ESPN NFL Insider Adam Schefter. "We enjoyed visiting with Peyton today in N.C.," Broncos executive VP for football operations John Elway wrote Friday on Twitter. "He threw the ball great and looked very comfortable out there."