David Stern, NBA
Stern sailed into office the same year as Michael Jordan entered the NBA, and four years after Magic Johnson and Larry Bird changed the game, so empowering the league wasn't exactly a difficult job. Still, he made the most of his three decades as commissioner by over-expanding to 30 teams, effectively eliminating physical play after the Malice in the Palace, installing a controversial dress code, overseeing two player lockouts that led to shortened seasons, letting the Sonics flee to Oklahoma City, and vetoing a trade that would send Chris Paul to the Lakers for seemingly no reason at all. Maybe worst of all, though, is that while the former commissioner now supports current NBA head man Adam Silver's endorsement of sports gambling, Stern's league was scarred by a betting scandal. In 2007, NBA referee Tim Donaghy was wagering on games he officiated, and was outed by an FBI sting. The scandal didn't help Stern's popularity with fans who still think he rigged the 1985 NBA Draft lottery and 2002 Western Conference Finals.