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Roosevelt Barnes, Jr. (born August 3, 1958) is a former football linebacker for the Detroit Lions of the National Football League and a current sports agent. He played three sports at Purdue University—football, basketball, and baseball. While he was most noted as a football player, he also enjoyed significant success in basketball, playing on Purdue's 1980 Final Four team. After retiring from professional football, in 1987 Barnes became a partner and contract advisor with Maximum Sports Management. He has negotiated contracts for Laveranues Coles, Walter Jones, Ray Lewis, Ndamukong Suh, Roman Oben, and Andre Wadsworth among others.