Rumble the Bison is the official mascot of the Oklahoma City Thunder. He is an anthropomorphic bison and his name derives from the sound that thunder makes. Rumble debuted on February 12, 2009 as part of the halftime show when the Thunder played against the New Orleans Hornets.
On August 13, 2009, Rumble was awarded the NBA Mascot of the Year award at the NBA's annual mascot meeting in Las Vegas. Rumble received the award in recognition of representing the Thunder at various community events throughout the Oklahoma City region. Even though he had only served as the team's official mascot for six months at the time, the mascot program Rumble developed was regarded as one of the best in the NBA.Rumble is a very popular mascot on account of his interaction with fans. He constantly gives hugs, high fives, and t-shirts to fans at random.
According to his official backstory on NBA.com, Rumble is the subject of a Native American tale that has been passed down for centuries which tells of a bison who was struck by lightning while saving his herd from a ferocious storm in the Arbuckle Mountains. The lightning transformed him into the anthropomorphic, super-powered bison known today as Rumble. When the Thunder arrived in Oklahoma City, he identified with them and joined the team.