Not to burst a bubble, but I'm pretty sure he didnt physically take the time to switch the balls himself. He signs a bunch of balls pre-season & mid-season and then gives them to his personal assistant. When she gets the mail, she just sticks one of the pre-signed balls in the return envelope and voila! While it's a nice thought, the reason you got a different ball back was because he wasn't available to sign the one you sent. Hence, he probably never seen the ball you sent, didn't personally take the time to switch it himself. But atleast you got an item back. I am sure you are correct, but hey works for me!