Died long time ago; cancer I think.
Sad, or he left just in time so that he wouldn't see what his son has turned into. The young man needs some type of stewardship in his life, and PJ and Aaron aren't doing too well. Someone needs to guide him past the lifting weights, and into another endeavor, like being a caddy at the local golf course, or model making.
When this passes, he's going to be a version of Bill Pettis, except Bill actually had a physique.