The Arizona Cardinals are signing Atlanta Falcons free agent defensive tackle Corey Peters to a three-year, $10.5 million contract, according to a league source. More than half the contract is guaranteed, per a source. Peters is best friends with linebacker Sean Weatherspoon, another Falcons free agent who's joining the Cardinals. Peters, 26, will hit free agency again when he's 29 years old. Peters has 11 career sacks in five NFL seasons. He had 26 tackles and two sacks last season. He has 146 career tackles and one interception. Follow me on Twitter: @RavensInsider Aaron Wilson covers the Ravens for The Baltimore Sun