By Thomas Neumann Indianapolis owner Jim Irsay added to his expansive memorabilia collection with Ali’s WBC championship belt. View the original article to see embedded media. Colts owner Jim Irsay is the steward of a renowned memorabilia collection, and Sunday he announced the addition of a signature piece. Irsay posted on Twitter that he has purchased Muhammad Ali’s WBC championship belt from the famed “Rumble in the Jungle” bout. The purchase was made for $6.18 million, according to Sports Collectors Daily, one of the highest prices ever paid for a piece of athletic memorabilia. Ali won the…