Mark Cuban took the Dallas Mavericks to a new level. He is the Mavs owner since 2000. The team before him had like 40% win/loss percentage and from 2000 on, they improve a lot, going for almost 70% in regular season. Great numbers and one word for that: intensity.
Check his interview with Jason Calacanis, not on basketball, but into business and all related to the world of entrepreneurship.