Answer
The Kazakh boxer Ruslan Chagaev had two reigns as the WBA heavyweight champion. His first reign began on April 16, 2007, when he defeated the reigning champion Nikolai Valuev, then continued until July 5, 2008. His second, and last, reign lasted only from August 30, 2014, to July 8, 2016 as he lost to Lucas Browne.