Originally written on Yahoo! Sports  |  Last updated 11/10/14

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.
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