Peterson

Agent Peterson is a S.H.I.E.L.D. agent meant to help Nick Fury find out what Thaddeus Ross' "Super-Soldier Program" did to Bruce Banner.

Early life
Peterson's past is not very obvious. The only things known about his past is that he joined S.H.I.E.L.D. and at some point he got six black belts.

Helping Fury find Bruce Banner
Fury was trying to find Bruce Banner and learn what Thaddeus Ross' "Super-Soldier Program" did to him. He tried to earn Bruce's trust by buying him a beer but he refused, saying "I'm sort of a mean drunk."

Fury continues to try to earn his trust, until he eventually tries to test his abilities by making two S.H.I.E.L.D. agents, named Johnson and Peterson, appear to be dating and one is cheating on the other with Bruce which makes Bruce confused about the situation. The other starts to fight Bruce, but Fury tries to act like he's going to help him, but Peterson punches him in the face.

This turns Bruce into the Hulk and he goes on a rampage and hits Peterson in the face, knocking him out. Fury and everyone else in the bar is surprised by his transformation. Fury tries to calm him down, but Hulk yells at him causing nearly all the glass in the room to shatter. Fury doesn't move at all. Hulk then runs out through the wall.