The Athletic Field
From Homestar Runner Wiki
The Athletic Field is the area of the Field where many crazy sports are played in Free Country, USA. There is a scoreboard, but instead of field goal posts, there are basketball hoops. Sometimes the field is painted like an American football field (although the numbers on the yard lines are incorrect and out of sequence), and sometimes it looks more like an association football (soccer) field. Some games played here include Peg Strong Sad and some kind of sport where you "hit stuff with a golf club", which the Crazy Go Nuts University Dumples compete in (see mascot). The Athletic Field has a climbing rope, which is apparently held up by Homsar, although what holds up Homsar, if anything, is not shown.
Strong Bad has this to say about the athletic field: "What the crap kind of freaked-up sport are you guys playing anyway? I mean, you're on a football field, but you've got a basketball goal, and basketballs and footballs..." to which Homestar Runner replied, "I know! It's America's pastime!"
It also appears to be not the only athletic field. In rough copy, Strong Bad reveals that The Cheat can hit Strong Sad from three football fields away. The third field has a sign reading "Field 3" and has a picture of The Jolly Dumple painted in the end zone.