R.V.
When your son wants to go play catch, tell him to ask his dad himself. Maybe you could tell him to say you don't throw the ball right or something (unless you don't want to look bad!). Most dad's find it hard to say no, especially if there's a chance to show you up! If he still refuses, it could be he's burnt out on baseball (which is still no excuse but a reason). Tell him you hate to sound like a nag, but he's not going to see his own son's first homerun, or be in any of the pics or videos because he didn't care enough to be there (don't tell him in front of your son though!). I read in a book that children get their self-confidence from their father. His involvement in his life now is very important and will shape the person he is later in life. Hope everything works out!