This thread led me to track down the story behind this puzzler from my youth.
“I was with the Cardinals in spring training, 1974. A couple guys got hurt, so I got a chance to play, and I went on one of my rare hitting streaks. Lou Brock said, ‘I really like the way you’re playing—I’m going to get you one of my famous Brockabrella hats.’ Ten years later [after the card] Brock called me and said ‘Thanks!’ because now everybody wanted a Brockabrella. I asked, ‘Do I get a piece of the action?’ And he said, ‘Yeah, I’ll send you a beer.’ That’s good enough for me; Lou was one of the class guys. Plus, Budweiser has been sending me a case of beer every year since."