Ultimate Frsibee Rule (1)705-294 - For a catch to be legal, the bro must have complete control of the disc prior to the disk touching the ground. He obviously did not have control of the disc before it hit the ground. This was probably overturned on instant replay. That, and any sport where a border collie can hand you your shit isn't really that impressive.
What is more impressive is how many people actually showed up to watch the match.