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(AP) -- The Kansas City Chiefs have placed backup tight end Martin Rucker on injured reserve with a right knee injury that will require surgery.

The Chiefs made the move official Wednesday while in the midst of a three-day minicamp.

Rucker hurt his knee during one of the Chiefs' voluntary offseason workouts June 1.

He was signed as a free agent to providedepth behind Tony Moeaki, who is returning from a torn left ACL that knocked him out during last preseason.

Rucker is a former fourth-round draft pick out of the Cleveland Browns, where current Chiefs coach Romeo Crennel had served as head coach.

Rucker played in 12 games with the Browns, Cowboys and Jaguars over the past four seasons. He had two catches for 17 yards.

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