HANG IT UP, LEBRON!!! TMZSports.com
LeBron James' 22nd year in the NBA needs to be his last -- at least that's what Mark Cuban's saying ... 'cause he tells TMZ Sports the King is just too damn good!!
We caught up with the Dallas Mavericks minority owner out in NYC this week ... and asked all about the Lakers superstar's future.
Needless to say, Cuban thinks it's time for James to wrap it up.