The current and fourth person to don the famous Captain America costume. His identity and origin are currently unknown.
After Steve Rogers was thawed out of ice after being frozen back in World War II, he was less than happy to discover that there was somebody running around as Captain America. Rogers has despised Captain America IV ever since he first saw him.
The current Captain America is an agent of S.H.I.E.L.D.
Captain America fought with the first Crimson Dynamo after he found the Russian sneaking around near Stark Industries. Although he was heavily outmatched and unable to defeat Crimson Dynamo, he did manage to give Tony Stark enough time to change into his Iron Man armor. After Iron Man defeated the Crimson Dynamo, Captain America helped him round up the other Russian spies.
He was assigned to track down the missing S.H.I.E.L.D. agent Frank Payne, who was secretly operating as the criminal known as the Constrictor until he was put into a coma and then escaped from the hospital.