Don Nelson — American Coach born on May 15, 1940,

Donald Arvid "Don" Nelson is an American former NBA player and head coach. He coached the Milwaukee Bucks, the New York Knicks, the Dallas Mavericks, and the Golden State Warriors... (wikipedia)

I spent 50 years in the NBA. Can you imagine doing something that you love the most in the entire world and doing it for your entire life and, besides that, getting a pile of money for it? It's unbelievable. I'm the luckiest guy in the world. And I know it.
You have a lot of ups and downs in coaching, especially, but I can't remember any bad times at this point. I mean, they're all good. A lot of tears when you lose, a lot of down times, but I can't remember any of them. They're all positive now. Even the bad times were good.
Really, throughout my career, what I've done is taken teams with bad records and with every situation I've made them better.
Where ever the Mavericks are today, we owe it to Michael Finley. He was the one guy who stayed when we were a terrible team. He stayed and fought the fight.
I'm a running coach and I am going to continue to run, but I would hope that we are better defensively.