Hulk

Origin and First Encounter With Wolverine
Dr. Bruce Banner was exposed to gamma radiation creating a new being, the Hulk. He was hunted by General Ross and his Hulkbusters. He went into hiding in Canada until he was found by Wolverine. The two had a brutal fight, but were interrupted by the arrival of Team X.

Captive of Weapon X
Wolverine and Hulk were captured by Team X and the Professor planned to brainwash them and use them both for his own purposes. His plans were short lived, however, as Sabretooth slashed him across the back, wanting to kill Wolverine instead. The two battled Team X, with Hulk facing Lady Deathstryke. She was ultimately no match for Hulk and he ripped off her cybernetic arms and knocked her out. Shortly afterward, the base began to collapse, but Hulk managed to escape. Later, Deadpool emerged from the rubble, having pieced himself back together, only for Hulk to land on top of him, injuring Deadpool once more.

Second Encounter With Wolverine
Hulk attacked Wolverine, but their fight was interrupted by the Wendigos. Hulk was knocked unconscious by the Wendigos and turned back into Bruce Banner. When Nick Fury and S.H.I.E.L.D. arrived, Wolverine punched Bruce Banner to turn back into Hulk and cause him to attack Nick Fury.

On the Run
He was mentioned twice in "Iron Man is Born", once by Nick Fury and once by Rhodey both of whom called him a monster.