is heading to Atlanta.The agreed to a five-year contract with the three-time center, the team announced Wednesday.The key to Mack's contract is the generous structure, Rapoport was told. The Maema Njongmeta Jersey first two years of the pact are fully guaranteed, with plenty of cash also coming in Year 3. Mack was helped by the fact that both the and were in hot pursuit of the eighth-year veteran.Chalk it up as a major signing for Atlanta, strengthening the club's offensive line with one of the league's grittiest interior maulers. Outside of mi sing 11 starts in 2014 with a broken fibula and ankle, Mack has started all 101 games of his career with the .There was hope in Cleveland that the team's newfangled front office would find a way to keep their trusty pivot, but Mack was a strong candidate to bounce after voiding his contract with the bottom-feeding .Undoubtedly, play-caller Kyle Shanahan also put in a good word for Mack after they worked together in Cleveland in 2014. He's an ideal fit for Shanahan's zone-blocking scheme and a serious upgrade over , who struggled at center last season. It's also great news for Shanahan's cast of running backs led by and .Mack, at last, has the chance to play with a franchise quarterback for the first time since the made him their first-round pick in 2009. Enduring countle s coaches, general managers and half-baked signal-callers in Cleveland, Mack and are an ideal match in Atlanta.The 30-year-old Mack struggled for parts of last season, but he's operated as one of the league's top centers from Day One. The money will be steep for a player of his age, but Mack has an excellent chance to finish out his deal as a reliable anchor along Atlanta's O-line.The , meanwhile, are watching another key player walk out the door. Malik Jefferson Jersey