Sam

Sam, known as Tom in the manga and Japanese version is an amateur duelist, Maximillion Pegasus used to humiliate Bandit Keith.

Manga biography
Tom was a fan of Duel Monsters, but didn't get enough allowance money to build a strong Deck.

When Pegasus and Keith arranged a Duel in the New York Duel Stadium, he was present in the audience. Before the Duel, Pegasus took time to gather children unfamiliar with the rules of Duel Monsters, including Tom and explained how to play. While helping Tom, he said that he was impressed with how well he was doing. Tom told Pegasus how he couldn't afford to make a good Deck, so Pegasus gave him a Deck as a gift.

At the start of Pegasus' Duel with Keith, Pegasus scanned Keith's mind with his Millennium Eye. Before playing any cards, he wrote down some instructions on a piece of paper and called Tom over. Using the instructions Tom defeated Keith.

Afterwards, Pegasus brought Tom over to the camera and invited people to buy Duel Monsters, a game where an beginner can beat a champion.

Anime biography
Sam was present at the Intercontinental Duel Monsters Tournament in New York City, having learned to play Duel Monsters the wek before.

At the start of Pegasus' Duel with Keith, Pegasus scanned Keith's mind with his Millennium Eye. He wrote down some instructions on a piece of paper and called Tom over. Using the instructions Tom defeated Keith.