Union's remarks come after Pierce, a former NBA champion and current ESPN NBA analyst, said his career was better than Wade's.
This year's class has a strong defensive theme, led by prolific defenders Bobby Jones and Sidney Moncrief.
Perennial champions the Golden State Warriors ought to be used to celebrating by now - but Nick Young's ring presentation ran over.
The Boston Celtics are set to have home-court advantage at the start of the Eastern Conference playoffs after thumping the Indiana Pacers.
The prolific Russell Westbrook provided a moment to remember against the Detroit Pistons with a sensational no-look assist.
Russell Westbrook will average a triple-double for the third season in a row and Paul George said: "Nobody will be able to match that."
Orlando Magic's ridiculous offensive performance in their dominant victory over Atlanta Hawks was fueled by three 25-point scorers.
The Lakers guard told the L.A. Times he will be selecting his own agent, dispelling rumors his father LaVar is involved.
Miami Heat star Dwyane Wade was once sceptical of the idea of seeing a therapist but now plans to do so after retirement.
Wade now embraces the idea of talking to a psychologist, after once having a skeptical attitude.