The Detroit Lions cleared roster space for newly signed cornerback Drayton Florence by waiving safety Ricardo Silva on Monday. Silva suffered stingers Thursday in the Lions’ final preseason game, according to The Detroit News, but the second-year pro had performed well to that point. Florence, 32, was a former starter for the San Diego Chargers and the Buffalo Bills. He signed a contract Sunday with the Lions. The Lions also finalized their eight-player practice squad Monday by signing receivers Kris Durham and Patrick Edwards, guard Rodney Austin, running back Stephfon Green, fullback Shaun Chapas, cornerback Ross Weaver, defensive tackle Lorenzo Washington and linebacker Carmen Messina.