Carlos "Los" Rivera was a co-founder of The Attack. He worked as a producer and Program Director for the show, and was basically the all-around tech guru. Los essentially built the technical backbone of The Attack from the ground up with his bare hands.
The show often made use of his intimidating 6'6" form, mostly to inflict pain on Alex.
He also hosted the Spitting Game podcast.
Los announced his departure on the 16 Oct 2017 episode of Front Page, saying that his new project was still a secret but that big things were on the horizon.
He will be sorely missed.
He is featured in the attkLos emote.