As an aside, he lost 200 lbs over 2 years, so about 8 lbs a month.

Thats on the aggressive side of a healthy weight loss pace, so kudos to him for not just losing the weight but apparently doing it healthily over an extended period of time instead of trying to rush it.

3500 Calories per pound of fat, so he was running a daily calorie deficit of around 930.

I lost 50 kilos in 10 months two years ago, or something like that.