People who are
very overweight lose weight pretty quickly when they first start out but Sam was never THAT overweight so I think what he lost was mosty water plus natural fluctuations. I wouldn't be surprised if he only lost 5 or less lbs of actual fat and you definitely wouldn't be able to see that in pics. Hell you wouldn't even really be able to see a 14 lb loss especially with clothes on.
I bet if there were before and after photos of him with no clothes on, we would not see a difference.
The only thing that looks a little different is his face and even then I mean
Those were both before the "weight loss". One his face looks slimmer, the other it looks fatter. Pictures can be deceiving.