There was a great article on ESPN two years ago about the unnatural amount of weight gain required to be an offensive lineman in the NFL. Great read if you have the time:
https://www.espn.com/nfl/story/_/id/29399747/how-nfl-offensive-linemen-escape-5000-calorie-lunch-transform-retirement
Soonbto be Hall of Famer Joe Thomas BETWEEN meals for example:
Thomas finds a McDonald's on the GPS. It will be quick -- just a bit of fuel between lunch and dinner. He orders two double cheeseburgers, two McChickens, a double quarter-pounder with cheese, one large order of fries and a large Dr. Pepper.
"Or another sugary drink," he said recently. "Just to add 500 calories, the easy way."