ENGLEWOOD, Colo. — Just two years removed from the neck troubles that weakened his right arm but strengthened his resolve, Peyton Manning is off to the best start by any quarterback in NFL history. He returns to Lucas Oil Stadium on Sunday a much better player than the one who left Indianapolis teary-eyed in 2012 after the Colts let him go in favor of Andrew Luck. Manning has four terrific targets in Denver to go with the skill, intellect, work ethic and determination he's always had.