Former Major League Baseball commissioner Fay Vincent isn't sure if the presence of Mark Cuban would be good for the game. Cuban, the billionaire owner of the NBA champion Dallas Mavericks, has been linked to baseball ownership in the past. "I went through the Steinbrenner business. Some of the behavior of owners can be very troublesome for commissioners," Vincent said. "I don't think Mr. Cuban's been an easy partner or owner for David Stern, and that would put me on my guard if he were to come to baseball." In 1990, Vincent banned Steinbrenner for life for paying a gambler to dig up dirt on then-Yankees outfielder Dave Winfield. Steinbrenner was reinstated in 1993, a year after Vincent left office. Vincent sees too many similarities between Cuban and Steinbrenner. "I think it's more important for owners to be gentlemen, play by the rules, respect the authorities, do what's good for the sport, than it is to manage his franchise into total success," he said. "The subtleties make the difference. George Steinbrenner was a real problem in baseball, and I think Mark Cuban is a real problem in basketball."