Municipal Stadium in KC (saw lots of Royals games there, including the final one if I recall correctly)
Royals Stadium/Kauffman Stadium (worked there, Arrowhead and Kemper as a food vendor from 1982-88; saw lots of games throughout my childhood)
Arrowhead
Municipal Auditorium in KC (saw lots of cool things here, including NAIA and Big 8 basketball and track, KC Kings games and Golden Gloves boxing)
Kemper Arena (saw quite a bit of basketball and hockey here, including the NHL Scouts (that didn't win a lot of games) and the CHL Blues (an excellent farm club for the NHL Blues)
Memorial Hall in KCK (vague memories of seeing some sort of event there, but it may have been a concert)
Metropolitan Stadium in Bloomington, MN (for a Twins-Tigers game, as a kid)
Comiskey Park (Old and New)
Wrigley Field
Soldier Field
Chicago Stadium
United Center
UIC Pavillion (Did my PhD at UIC. Got to see Joanne McCarthy (Jenny's sister) play basketball there. She was very talented.)
Alumni Hall (DePaul University's old stadium. Saw a basketball game there.)
Milwaukee County Stadium (There for several hours trying to wait out a rain delay in what was scheduled to be the last Brewers game when I bought the tickets, but the construction accident at Miller Park later caused the Brewers to play one more year there. Ended up leaving before game, which had to be played because it had playoff implications for the visiting Reds.)
Arlington Stadium (1 game @ Texas Rangers old ballpark, a nice old stadium)
Tigers Stadium (Saw the Royals play a game in the final homestand there. Seats were made for much smaller humans than exist today.
)
Oakland Alameda County Stadium
AT&T Park (going there this Sunday for my 3rd game)
ARCO Arena (where Sacramento Kings play)
Spartans Stadium (San Jose State University)
Dobbins Baseball Complex (UC Davis baseball. I'm on the UC Davis faculty.)
(New) Stagg Field & Henry Crown Fieldhouse (my alma mater is U of Chicago.)
Safeco Field (Seattle Mariners)