Losing weight at his size might be better, but it's not going to come without a price to his bowling.
A man that size does in fact have a style that's adapted to fit the girth he's got. You slim someone that size down to a more managable weight, things are going to be over. For years his armswing has been used to going around his sides. With it no longer there, it's a new armswing to learn. Timing will be off as well.
Have I done that type of weight loss? No, but a friend I've bowled with for the last 7 years has. Jkiser01 knows him as well. I remember the first night he came back from his surgery. Didn't practice all summer and went from 400lbs down to 270 (at that time). First 5 shots were in the gutter. All of a sudden, he didn't have to bring his arm around his sides.
Personally, it's ok to make a comment on his physique or whatever you want. Just be prepared for retaliation all depending on how you attack.
--------------------
BR.com.....going down the toilet one nugget at a time!!
g thing is back....with a vengeance!!