Washington Redskins linebacker Keenan Robinson could miss the entire season with a torn left pectoral muscle, according to NFL Network and the Washington Post.

The 2012 fourth-round draft pick from Texas could miss anywhere from three to five months.

Robinson got hurt Thursday

It's a familiar injury for Robinson, who tore his right pectoral and was out for the season last year as a rookie.

He had to undergo surgery for that one and will likely require another surgery to repair the damage to his left side.

Robinson was regarded as a key backup.

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Aaron Wilson covers the Ravens for The Baltimore Sun