Originally written on Fox Sports  |  Last updated 11/9/14

SAN FRANCISCO - NOVEMBER 29: Derek Cox #21 of the Jacksonville Jaguars tackles Delaine Walker #46 of the San Francisco 49ers during the first quarter at Candlestick Park on November 29, 2009 in San Francisco, California. The 49ers beat the Jaguars 20-3. (Photo by Justin Sullivan/Getty Images)
The Jacksonville Jaguars have placed cornerback Derek Cox on injured reserve with a knee injury, the third defensive starter lost in the last two weeks. The Jaguars made the move Friday, three days after linebacker Clint Session was placed on IR following a second concussion this season. The team also lost cornerback Rashean Mathis to a season-ending knee injury nearly two weeks ago. The team signed quarterback Dan LeFevour off Indianapolis' practice squad to take Cox's roster spot. Cox, who has 16 tackles and 10 passes defended this season, is the 17th player the Jaguars (3-7) have placed on IR this season. Making matters worse for Jacksonville, which hosts Houston on Sunday, is both defensive linemen Terrance Knighton and Matt Roth have been ruled out. Aaron Kampman is questionable.
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