Mikey,

Great idea, I'm right there with you. Ballpark runs are the way to go. I've done 19 current stadiums (24 in total including expired stadiums) and have seen eight different parks this year. And it's lame that the Mastercard guys are turning this accomplishment into a trite cliche!

But anyway, to answer your question, I don't think UA would be a good sponsor of this trip--with the way teams travel and the scheduling issues, you would have to do a LOT of flying to catch all the parks, including a very criss-crossed route in the east and midwest. You may want to think about a car sponsorship instead.

The other thing to try is, as someone else suggested, to use United on specific weekend leisure trips where you can knock off a couple of stadiums in a weekend. This year I took a Friday to fly to Cleveland for a game @ Jacobs, drove to Detroit for Comerica on Saturday, and then humped it over to Milwaukee for a Sunday afternoon game. This was great, but it shows you how tough it is to schedule the itinerary--we drove right through your hometown in Chicago but since I'd already seen Comiskey we kept going north to Milwaukee. Ideally, the Cubbies would have been in town, but the schedule didn't work out.

Maybe Hertz or Avis will sponsor you instead! In any event, good luck...

ps. and always remember to check the time zones!