U.S. Agent

John Walker

Played by Wyatt Russell

John Walker is a decorated U.S. Army veteran and Medal of Honor recipient selected by the government to become the new Captain America after Steve Rogers stepped down, before losing the title over an act of brutal, unauthorized violence. Injected with an unstable Super Soldier Serum variant, he continued operating with enhanced strength under a new government-sanctioned identity, U.S. Agent. Read more →

First turns up in The Falcon and the Winter Soldier.