Defensive tackles DeMario Pressley and John McCargo signed with the Bears. Both are former N.C. State players who haven't become regulars in the NFL.McCargo, 28, was a first-round pick of the Bills in 2006, but spent most of that season on injured reserve and never found his niche with the Bills. He was traded to the Colts in 2008, but that trade deadline deal was voided the next day because McCargo failed his physical.The Buccaneers signed McCargo in August 2011, but he was on and off the active roster as a No. 3 or No. 4 defensive tackle.Pressley, 26, spent last season with the Carolina Panthers and joins his fourth team in four seasons. He played for the Texans in 2010 and with the Saints in 2009.