Added Royals Stadium (OK, not a bad upgrade, but boy the team is terrible) and Busch Stadium (Wow!) to the list. Corrected my header to show 16 current and 28 total ballparks.)

Forgot to add Dodger Stadium last Sept. Now up to 26. New Busch and New Yankee Stadiums scheduled, and hopefully will catch Royals Stadium when I'm in Missouri next month.

Now at 25, having added Minute Maid Park (Great!) and Coors Field (OK) last week. New Yankee Stadium will have to wait until either the playoffs or next year, but pinch hitting will be Dodger Stadium and possibly Petco Park next month.

Added number 23, New Shea (I understand it has another name, but I didn't hear it used much! Better it's named after a lawyer than a bankrupt bank.) New Yankee Stadium is on deck, next month. Minute Maid Park in the hole.

Now officially at 22, after adding Tropicana Field and Nationals Park this month. (Thank goodness for business trips to the right places, at the right times!)

Ballpark list so far:

Polo Grounds
Yankee Stadium
Shea Stadium
Fenway Park
Memorial Stadium
Veteran's Stadium
Old Busch Stadium
County Stadium
Wrigley Field
New Comiskey
Camden Yards
Municipal Stadium
Three Rivers Stadium
Tiger Stadium
Turner Field
Olympic Stadium
Jacob Field
PNC Park
Citizen's Bank Park
RFK Stadium

Been to the Metrodome and Tropicana Field, but for the NCAA Final Four.

Pending trips: Tropicana Field (had to add baseball to the list!) and Nationals Park