Participating teams include the Diamondbacks, Braves, Orioles, Red Sox, Reds, Indians, Astros, Dodgers, Brewers, Mets, Athletics, Phillies, Mariners, Cardinals and Blue Jays.
Specials vary. I checked St. Louis, where my sons live, and NY, where we're going to visit next week.
For the Mets, you can get 4 reserved box or upper level reserved tickets, along with $20 in Mets money, for $66 or $44 respectively. Available games are listed, mostly on Tuesdays, Wednesdays or Thursdays.
For the Cardinals, Tuesday and Thursday games are available at $60 for 4 terrace reserved tickets, 4 small sodas, 4 hot dogs, and 4 soft Cardinal hats.
You have to use your Mastercard to buy the tickets, of course.
I took my sons to the Cards game using this special last year, and it was an affordable fun outing. That's why I just checked to see if they were doing it this year.
http://mlb.mlb.com/sponsors/masterca...4/stlouis.html