Conversation so far:
Was he an owner of the Dallas Mavericks?
Cuban purchased a majority stake in the NBA's Dallas Mavericks.
Did he make good money on them?
CANNOTANSWER.
Was there any controversy around this?
In May 2010, H.
Ross Perot, Jr., who retained 5% ownership, filed a lawsuit against Cuban, alleging the franchise was insolvent or in imminent danger of insolvency.
What was Cuban's response?
In June 2010, Cuban responded in a court filing maintaining Perot is wrongly seeking money to offset some $100 million in losses on the Victory Park real estate development.
Did Perot win the suit?
The lawsuit was dismissed in 2011, due in part to Cuban asserting proper management of the team due to its recent victory in the 2011 NBA Finals.
Was there an appeal?
In 2014, the 5th Circuit Court affirmed that decision on appeal.
Are there any other interesting aspects about this article?
In the 20 years before Cuban bought the team, the Mavericks won only 40% of their games, and a playoff record of 21-32.

Question: How did they do after he bought them?
Self-contained rewrite: How did the Dallas Mavericks do after Mark Cuban bought them?