Alan Faneca (320 pounds) was a six-time All-Pro with the Pittsburgh Steelers.
Alan Faneca was one of the best offensive guards in the business for a long time. He went to nine straight Pro Bowls, primarily as a member of the Steelers. He did all that while weighing around 320 pounds.
NFL weight: 316 pounds
Rookie year: 1998
The beefy Steelers legend lost over 100lbs, and is now a svelte marathon runner.
But when his career was over, he recognized some of the health problems that come with being that heavy. Since his retirement in 2011, Faneca has lost 110 pounds, primarily by limiting himself to 1,800 calories per day. He took up running as a hobby, and in 2014, he finished a marathon in just under four hours.
If you saw him today, Faneca would almost look frail compared to the behemoth of a man he was with the Steelers all those years.
Heaviest: 316 pounds
New weight: 206 pounds
Weight loss: 110 pounds