I actually never met him. I was at a Minor League game at Jack Russell Memorial Stadium in Clearwater, Florida in 1997, when the St. Petersburg Devil Rays came to play the Clearwater Phillies.
I was collecting autographs after the game had ended, as Devil Rays players were exiting the clubhouse and getting onto the bus. I can't remember who, but one of the players asked if I had gotten everyone. I told him I was waiting for Callaway. He then informed me that Callaway was already on the bus. I guess while I was getting players to stop and sign for me, he must've walked by without me noticing. The player then offered to take the card onto the bus for me and have Mickey sign it.
Mickey signed a 1996 Tampa Bay Devil Rays Team Set card.