"There is something about 18 years ... 18 is a good number," Manning said. "Today, I retire from pro football." As prepared as Peyton Manning is for everything, there's no way to script how you'll feel walking away from a game you've given your life to. With family, friends and former teammates looking on in the Denver Broncos meeting room, Manning had a news conference to officially announce his retirement after 18 NFL seasons with the Broncos and Indianapolis Colts. His voice was shaking most of the time as he thanked his hometown of New Orleans, the University of Tennessee, the Colts and Broncos, his old teammates and coaches, and his family. He thanked everyone, really. The quarterback made four Super Bowl trips with two titles, set a slew of records and earned a place on football's Mount Rushmore. He will retire as the NFL's all-time leader in passing touchdowns (539), passing yards (71,940) and quarterback wins (186, tied with Brett Favre).