12-Year-Old Boy With Heart Condition Leads Favorite NFL Team to Victory

Josiah Moore showed his football skills to the Raiders' coaches and players.

Since then, his love of the team has grown and he cheers on the Raiders with a full heart every single game.

"I never miss a Raiders game," Josiah told ABC News. "Ever in my life."

After Josiah signed his "contract" to be the Raiders honorary captain, GM Reggie McKenzie said, "Welcome to the Oakland Raiders!" Josiah took the field along with the team and showed off his skills to head coach, Jack Del Rio.

"I got some blitzes that will help," he said. "It's called bam-bam," he said as he ran around the turf.

Inside the locker room, Josiah stood huddled around his NFL idols as he arrived at his very own locker.

"We are locker buddies today," Raiders quarterback Derek Carr told Josiah.

Josiah even helped lead the team in a post-practice cheer, "One two three -- Win!" he shouted.

The next day, game day, Josiah's big dream became a reality when he took the 50-yard line for the coin toss. His dad Steven said, "As of this moment -- Josiah is healed -- Josiah is Josiah."