I really think he should teach Kearns a whole new batting stance and swing. What's the worst that could happen? His bat speed is so terribly slow with his current setup.
I think they have probably tried but he may be a case of an old dog not able or willing to learn new tricks. For example, one trick my dogs refuse to learn is to hold their elimination until the game is over even if it's extra innings! I hope I don't miss something good while I'm out.