The Denver Broncos opened organized team activities at their Dove Valley facility in suburban Denver yesterday, and newly acquired quarterback Peyton Manning returned to the practice field for the first time in more than 16 months. Manning reportedly was sharp in the voluntary workout, firing darts to his receivers in drills and in offensive sets. He showed no visible ill effects from the neck surgeries that caused him to miss the entire 2011 season when with the Indianapolis Colts. The Broncos were missing a pair of players from the first OTA workout of the summer – defensive tackle Ty Warren, whom the Broncos are trying to get to accept a pay-cut, was a no-show, as was linebacker D.J. Williams, who was in court facing trial on a DUI charge. Williams’ case ended on a mistrial before the jury could be selected.