He reportedly came to camp about 3 1/2 weeks ago at 305 pounds, but on Wednesday Fairley said he was at 315, apparently down a few pounds from where he was a week ago.
How do you gain that much weight with regular practices going on during such a structured part of the season as training camp?
"I really can't tell you," said Fairley, entering his fourth season as a defensive tackle for the Detroit Lions. "Just eating. That's it.
"I would say my eating habits got out of the way within these past two weeks, that's all."
Fairley, who met with the media following Wednesday's practice for the first time since he was demoted last week from starter to second-team, admitted that 305 is probably his "ideal" playing weight, but he said he's just fine with where he's at right now.
"I feel good," he said. "I can play here (at 315)."
Fairley said that his demotion was a "wake-up call" for him, but he still intends to win back the starting job from C.J. Mosley before the regular season begins on September 8.