The Kansas City Chiefs have placed running back Joe McKnight on the PUP list, according to the Kansas City Star.
As a result of the move, McKnight won't count against the team's 90-man training camp roster.
Chiefs head coach Andy Reid told reporters Sunday that McKnight had arthroscopic surgery on his knee between mini-camp and training camp.
Herbie Teope of the Associated Press reports that McKnight sat out the final day of minicamp with a swollen knee.
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A running back by trade who's seen the majority of his NFL playing time as a kick returner, McKnight, 26, is seeking to restart his NFL career in Kansas City after sitting out last season. He was cut by the New York Jets in August 2013.
In 2011 he was named First Team All-Pro team after averaging 31.6 yards per kickoff return.
- Dan Gartland