KANSAS CITY, Mo. -- Kansas City Chiefs linebacker Brandon Siler tore an Achilles' tendon during practice this week and is the latest to join a growing list of NFL players to sustain the season-ending injury.
Siler's agent, David Canter, confirmed the injury in a text message to The Associated Press on Wednesday. He did not know which Achilles was hurt, but said Siler already had surgery to repair it.
"We're both beside ourselves upset," Canter said.
"I don't really know what happened," said Demorrio Williams, who has been competing with Siler for playing time. "I just saw him land on the ground."
First-round draft pick Jonathan Baldwin hurt his right thumb in a reported locker room altercation with running back Thomas Jones. Fellow wide receiver Steve Breaston also has missed some practice time, along with offensive linemen Jared Gaither, Ryan O'Callaghan and Darryl Harris, cornerback Brandon Flowers and linebackers Gabe Miller and Eric Bakhtiari.
"I think we have good depth," Johnson said. "It's always tough to lose a linebacker, and it's hard. It's hard. But this is a violent sport."
Siler's injury is the first significant one for the Chiefs, though hardly the first round the league, where some believe the NFL lockout has contributed to more season-ending injuries.
Detroit's second-round draft pick, running back Mikel Leshoure, tore an Achilles tendon earlier in fall camp. Browns punter Reggie Hodges sustained the same injury after he took a snap in the end zone, took one step and dropped like a sack of flour. Philadelphia defensive end Victor Abiamiri and Bengals linebacker Roddrick Muckelroy are among the other players to tear their Achilles.
The lockout wiped out organized team activities and the ability for players to use team facilities during the summer months, which some argue resulted in players arriving at camp out of shape.
Browns linebacker Scott Fujita, a member of the players' executive committee, has said he is personally monitoring some of the reported injuries from other training camps. He's also asked trainers to keep him updated on missed practices to determine whether the lockout had any effect.
Copyright 2011 by The Associated Press.