The first time I remember seeing him was in the end of the Matrix Online stream, unless I've got some names mixed up. Did that start the whole thing, or do they have history from before?
Yeah, when they were doing the Not Like This stream to record the end of The Matrix Online they found Matt in there. He and the Giant Bomb guys hung out in their pink gis as the game ended, but he later showed up on the site and the rest is kind of history.
Here's a reference image for distinguishing between all of them. Bodega is the one in the back.
I suddenly have this urge to ask about Diretide....