This individual has no known canonical name.  While the information presented is canonical, the individual described lacks an official name, thus the title is conjecture.

Big Guy was a guest of the local steak house O'Malley's Bar & Grill. He played a game of billiard with Samantha Carter. At the time she was under the influence of the Atanik armbands. Carter beat him easily and Daniel Jackson tried to tease the loser a bit. Big Guy responded by calling Jackson a geek, which he couldn't ignore. It lead to a full blown bar fight. Several people were injured, with Major General George S. Hammond stating afterward that it was "lucky" that SG-1 hadn't killed any of the men they had beaten up. (SG1: "Upgrades")