DALLAS — Fear is something Udonis Haslem has rarely experienced.



He’s earned a reputation as one of the NBA’s toughest players during his 16-year career with the Miami Heat. He is a throwback to the days of when enforcers roamed the paint waiting for the opportunity to rough up an opposing player who got out of line. They often refer to him as “Warrior” because he’s never afraid of going into battle with his teammates.



Yet these days Haslem is frightened.



With his playing days winding down, the thought of trading his uniform for a business suit is downright scary. That is why he is contemplating playing another season with the Heat instead of following close friend Dwyane Wade into retirement in a few months.



“I’m not 100 percent sure I’m done,” Haslem said. “I know I said I had nothing else to prove. It’s coming close but, man, I still have so much to give. … We’ll...