Chargers rookie ILB Donald Butler will miss the 2010 season after suffering an injury to his Achilles' tendon during a training-camp practice on Tuesday.
The 6-1, 248-pound Butler was chosen in the third round (79th overall) of April’s draft. An honorable mention All-America and a second-team All-Pac-10 choice for Washington, Butler started two seasons and tallied 238 tackles, 28 tackles for loss and four sacks.
Butler was expected to be part of the rotation at inside 'backer during his rookie campaign. His loss leaves the Chargers thin at the position and could force them to sign a veteran free agent for depth.
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