Not sure if this is the same article, but if you're dealing with the kind of dad I think you might be referring to, this might be similar:
Rick Ankiel's fatherIf you're in the game long enough you'll probably run into a few dads like this. #2 had a teammate who's grandfather was extremely difficult. Always calling the boy over to the fence to talk to him between innings, yelling out pitches, flashing signs from behind the backstop. The ultimate was when he would get up and leave to show how truly disgusted he was with the boy's performance. Very sad to witness. That boy is now a lost soul - arrested numerous times for drugs, DUI, theft - his own parents have no idea where he is.
These kinds of people rarely see themselves for what they really are. They are always right no matter how many people try to tell them their behavior is more harmful than helpful.