Kansas City, Mo. ? The Kansas City Chiefs could fill out quite a roster using players on injured reserve.

Joe McKnight is the latest to make the list, rupturing an Achilles tendon in practice on Thursday. He’s already the third Chiefs player to sustain a season-ending injury to an Achilles tendon, joining Pro Bowl linebacker Derrick Johnson and defensive tackle Mike DeVito.

Offensive tackle Jeff Allen also is on IR after hurting his biceps. Defensive tackle Mike Catapano is on the list after a lengthy illness. Wide receiver Kyle Williams, quarterback Tyler Bray and safety Sanders Commings didn’t even make it through training camp before landing on the list.

Throw in a few players who have been banged up, including Pro Bowl running back Jamaal Charles and safety Eric Berry, and the Chiefs may have reached their limit of bad karma for the season.

“They always say, ‘Two things you can’t worry about are weather and injuries, because you can’t control them,’ ” Chiefs defensive coordinator Bob Sutton said. “It’s one of those things.”

McKnight has been plagued by injuries dating to his days at Southern California, and he never could stay healthy with the New York Jets. He spent last season out of the NFL entirely, but seemed to be catching his stride after enduring more physical hardships in training camp.

With Charles out of the lineup last week against Miami, McKnight stepped into the role of the primary pass-catcher out of the backfield. He wound up with six receptions for 64 yards and a pair of touchdowns in a 34-15 win over the Dolphins.

Even with Charles expected to return Monday night against New England, McKnight had started to elbow his way into regular playing time, if nothing else than on special teams.