For those of you who might not remember 14 years ago...
The Celtics were playing the Pacers in the playoffs in 2005. In the last moments of regulation of game 6, with the Celtics leading by 1 and with possession, Pierce elbowed Jamal Tinsley after the whistle for his second technical foul of the game. It was an egregious moment of lack of self-discipline that nearly cost the Celtics the game, had it not been for the team rallying in OT. As he left the arena after his ejection, he taunted the Pacers crowd by spinning his jersey above his head, bare chested. Of course, after the game, Pierce came out in his infamous face bandage for the post-game interview, mocking the whole episode. No contrition, no self-awareness, nothing.
(Video:
https://www.youtube.com/watch?v=qbwm2tolAHo)
(Video:
https://www.youtube.com/watch?v=yroYIQiAQyI)
Many of us, myself included, wanted Pierce out of town. Honestly, if you didn't experience this whole thing live, I'm not sure I can explain how infuriating it was, especially given Pierce's existing reputation. It was disgusting. Sure, he was an offensive marvel, but he had proved himself immature, self-absorbed, and everything but a winner.
Pierce's age at the time: 27 years old. That is, the same age as Kyrie Irving now.
Always remember this chapter in Celtics history when you think about Irving. Ainge was level-headed after 2005 -- thankfully, more level-headed than any of us -- and stuck with Pierce. It's a good thing he did. He matured, turned into a leader, and won the Finals MVP a couple of years later.