Kansas City, Mo. ? The Chiefs put center Rodney Hudson on injured reserve Wednesday with a broken bone in his left leg and signed offensive linemen Russ Hochstein and Bryan Mattison to provide depth.

The moves came one day after Kansas City put cornerback Jacques Reeves on IR.

Chiefs coach Romeo Crennel said veteran guard Ryan Lilja will start at center on Sunday against San Diego, and rookie Jeff Allen will take his place. It will be the same arrangement that Kansas City used once Hudson was hurt in last Sunday’s overtime victory in New Orleans.

“In this job, that’s what they tell you, ‘There are going to be three things you don’t expect to happen every day.’ Not just every week, but every day. So you have to deal with it,” Crennel said. “You have to replace guys that are not available.”

Last season, it was the quality of players hurt: Pro Bowl safety Eric Berry, All-Pro running back Jamaal Charles, quarterback Matt Cassel and tight end Tony Moeaki. This year, it’s been sheer quantity.

Starting cornerback Brandon Flowers and backup Jalil Brown are back after missing time earlier this season, linebacker Derrick Johnson has been hobbled, and safety Kendrick Lewis remains limited in practice with a right shoulder injury sustained during a preseason game.

Tight end Kevin Boss sustained a head injury two weeks ago at Buffalo, and he missed practice along with running back Peyton Hillis, who hurt his ankle in the overtime win over the Saints.

Wide receivers Dexter McCluster (elbow) and Devon Wylie (hamstring), tight end Jake O’Connell (knee) and defensive tackle Anthony Toribio (ankle) were all limited.