13 for me, how about you?
Demolished parks, 4:
-Cleveland Municipal Stadium (Indians)
-Shea Stadium (Mets)
-Three Rivers Stadium (Pirates)
-Yankee Stadium (Yankees)
Current parks, 9:
-Comiskey Park (White Sox)
-Fenway Park (Red Sox)
-Jacobs/Progressive Field (Indians)
-Kaufmann Stadium (Royals)
-Oriole Park at Camden Yards (Orioles)
-PNC Park (Pirates)
-Skydome/Rogers Centre (Blue Jays)
-Tiger Stadium (Tigers)
-Yankee Stadium (Yankees)