No it didn't. Just another example of junk science.
> Now burns 800 fewer calories a day than would be expected for a man his size.
"Expected for a man of his size" is a fiction. What they are insinuating here is that the rapid weight loss did long term damage to his metabolism. But to confirm that, you have to have data on what is burn rate was when he was previously at his current 295 weight. (Which he must have reached at some point in his life long before the participation of Biggest Loser, on his way to becoming 400-something). Comparing to what can be "expected" based on plugging 295 into some model is not adequate.
Maybe he previously also burned hundreds of calories less than what can be expected of someone of his weight. Maybe it's been like that most of his life!