Josiah Moore, 12, may have a severely sick heart, but it still ticks strong for the Oakland Raiders — his favorite NFL team.

Moore was born with hypoplastic left heart syndrome, which means only half his heart is functioning properly, and he has had three open-heart surgeries in his short life.

At four years old, he received an Oakland Raiders jersey and hasn’t looked back. He catches every game on television and knows all the players and their stats like the back of his hand.

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

Thanks to the Make-A-Wish Foundation and Macy’s, Moore recently got the chance to sign a contract with the team and join them as a captain for their game against the Denver Broncos.

He got his very own locker and stepped onto the field with  Raiders’ co-captains for the coin toss.

Have a look at his full and exciting day:

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Moore’s leadership made a huge difference. The Raiders went on to beat the Broncos 30-20.