The Dallas Cowboys have added depth to their linebacker group on the eve of free agency.
The team announced Wednesday that former Bills linebacker Keith Rivers has signed a one-year contract with the team.
Rivers can play both weak side and strong side linebacker, giving the Cowboys the type of flexibility they need with the position in a state of flux. Justin Durant, Rolando McClain and Bruce Carter -- the team's top linebackers in 2014 -- are all headed toward free agency and are expected to test the market.
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