To be fair, OP didn't say anything about being at the game. Could be at home.
9x 4% 12.5oz beers in 3 hours is quite a lot, but it's definitely something that could be accomplished without the person necessarily having a problem. I know plenty of people who are not alcoholics but have stories of one-off nights like that with friends.
Definitely don't do this in a public, child-friendly venu though. That would be grossly irresponsible.