I didn't look in to his league records, but if he is winning a lot then his prices might be fine as he might sell out all 8000, but based on his attendance records he doesn't seem to have been getting anywhere near the 8000 mark. Simply dropping his price to 10 dollars will make him some profit.
7000 seats sold (what he seems to be selling) x 11 dollars a ticket = 77000
vs
8000 seats sold (which he would sell if he lowered his prices) x 10 dollars a ticket = 80000
Not much of a difference, but if he built more bleachers he would see a much larger difference.
Even in this case he is gaining a few thousand extra per week from lowering his prices, and once his winning streak his up he can always increase his prices back up.