Depending on your experience level and keen geosense, this could be a quick stroll and grab, or a somewhat lengthy search. I have only found two caches like this and have enjoyed both of them immensely!
You can park just outside the gates of the stadium (lots of people do). Most days, the area is quiet, with only a few dog walkers and joggers passing by. Please do not attempt this one when there is a game going on at the stadium. On average, there are only 6 home games in the Fall, so that leaves 359 days to hunt this cache!