night after that rookie fullback for team usa made history. Barely made the world cup team but John brooks now a huge star after that stunning header against Ghana last night. Became the first sub... See More
night after that rookie fullback for team usa made history. Barely made the world cup team but John brooks now a huge star after that stunning header against Ghana last night. Became the first sub ever to score for the U.S. In a world cup and ABC's Paula Faris has the story. Usa. It's John brooks. It's John brooks for the usa. Reporter: It was the winning goal scored by the most unlikely of heroes. That tiebreaking and earth-shaking header came courtesy of team usa's 21-year-old rookie substitute John brooks who before Monday night had never played in a competitive game for the U.S. National team and only made it off the bench after another player was injured. Every team wants to start with a win and we did it. Reporter: The historic header marking the first goal ever scored by a U.S. Substitute in world cup history and a dream come true for brooks. I had a dream like two days before and that I scored in the 88th minute and now it's the 86 minute. I'm happy about it. Reporter: Within moments brooks became a household name trending on Twitter. His profile page even becoming the most read article on wikipedia. Some fans editing the page dozens of types to highlight his new icon status. This one reads "After scoring against Ghana, he is now among the ranks of John F. Kennedy, chuck Norris and Abe Lincoln as American heroes." So who is this new American icon? I'm John brooks and this is my story. Reporter: The 6'4" inch defender was born in Berlin to a U.S. Serviceman from Chicago and German mother. My mom is the most important person in my life. Reporter: The overnight sensation also has two tattoos, one honoring Berlin and another Illinois. Brooks is one of 17 players on the U.S. Team making their world cup debut. Graham zusi also a rookie had the assist for his game-winning goal. This is your first world cup. How do you approach it? I try to talk with some of the veterans and find out what to expect and the message from them has been to enjoy it as much as possible. Reporter: And the message this young American squad is accepting to the world -- they came to play. And John brooks has never lived in the United States, in fact, he's one of three German born Americans on this roster and when he was named to the team a lot of people were surprised but, George, this morning, no one is questioning that decision especially from down here in beautiful Brazil. And everyone enjoying the win and enjoying that beautiful scene in Rio.
This transcript has been automatically generated and may not be 100% accurate.