IRVING, Texas -- The Dallas Cowboys released center Ronald Patrick from the practice squad and signed guard Rishaw Johnson. Johnson, 6-foot-5, 313 pounds, was cut by the Tampa Bay Buccaneers last week. He started his college career at Ole Miss but was kicked off the team in 2010 for violating team rules. He transferred to California (Pa.) University and played in the 2012 Senior Bowl. He has spent time with the Seattle Seahawks and Kansas City Chiefs.
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