The Cincinnati Bengals lost their starting tight end Wednesday when they placed Reggie Kelly on season-ending injured reserve.
Kelly, an 11th-year veteran who was entering his seventh season with the Bengals, ruptured his left Achilles' tendon during training-camp practice Monday. He had surgery to repair the tendon Wednesday.
The Bengals also had two more tight ends suffer injuries Wednesday.
Ben Utecht, a sixth-year veteran, sustained a concussion during Wednesday night's practice and was taken to a hospital as a precaution. During a full-speed drill, Utecht appeared to hit helmets with linebacker Darryl Blackstock and fell to the ground, temporarily unconscious.
Teammates knelt next to Utecht and prayed while he was strapped to a stretcher and loaded into an ambulance for the trip to the hospital, where he was kept for observation. Bengals spokesman Jack Brennan said Utecht had full movement of his arms and legs.
Daniel Coats, another reserve tight end, sprained his ankle during a morning workout and was on crutches for the evening session.
The injuries leave two rookies -- third-round pick Chase Coffman and undrafted Darius Hill -- as the only healthy tight ends on Cincinnati's roster.
The Associated Press contributed to this report.