Kenny Lofton. Early in his career he did a couple seasons in the NY-Penn league with my hometown Auburn Astros. I was 8 or 9 and the ballpark was only a few blocks from my house, so I used to go watch practice almost every single day. I guess a lot of the players and coaches just got used to me being there.
Anyway, Kenny would call me out onto the field and let me try to catch fly balls with him during BP. He also would send me to the Wilson Farms store to get him snacks and soda, and would always give me enough money to buy myself something. Super nice guy, and back then literally no one knew anything about him.