ENGLEWOOD | Menelik Watson chose Denver in free agency not just for the $18-plus million contract over three years but also the chance to work with the Broncos’ renowned training staff. Yet, Watson’s first season in Denver was marred by injury just like his four years in Oakland were and the Broncos placed him to injured reserve Wednesday with a torn foot tendon he sustained Sunday in Philadelphia. He was also bothered by a strained calf that sidelined him against the Chargers last month and limited him at practice.