He's in a Pittsburgh rec league, and apparently he has some limited skills, according to Deadspin.
The game was at 6:30pm. Harrison showed up right at the beginning of the first game. In PSL dodgeball, you play 11 games in a night, with each game lasting roughly 5 minutes. Harrison played in about 8 of 11 games, showing his endurance may be suspect heading into the 2013 season. However, the other team also had numerous subs so that could have factored into his decision to sit out. I say "his decision" because who is going to tell Harrison to take a seat?
On the court, Harrison displayed excellent agility and ball catching skills, but unexpectedly lacked the big arm. He started the first few games throwing decently hard, but eventually started rolling the balls across the court to avoid having his balls caught. Some scouts might speculate that fatigue could have been a factor. Notably, Harrison made a spectacular one-handed catch with one ball already in his other hand. You can't teach size and wingspan. In the end, Harrison led his team to a 7.5 to 3.5 games victory [Wednesday] night.
He was having fun the whole time, except during that picture haha. He definitely played with a lot of swag out there.