The Shark Tank star has had to do damage control after Sports Illustrated revealed a toxic culture in his NBA team's workplace. And while Cuban has said he's a hands-on owner, he said he was unaware of the problems among his staff. “I want to deal with this issue,” Cuban told Sports Illustrated. “I mean, this is, obviously there’s a problem in the Mavericks organization and we’ve got to fix it. That’s it. And we’re going to take every step. It’s not something we tolerate. I don’t want it. It’s not something that’s acceptable. I’m embarrassed, to be honest with you, that it happened under my ownership, and it needs to be fixed. Period. End of story.” ALSO: Cuban can't plead ignorance and expect us to take him seriously.