
Shaquille O'Neal and LeBron James have more in common than people think. (Yoon S. Byun, Globe file / Mike Ehrmann, Getty Images)
Shaquille O'Neal announced his retirement via Twitter and the social media tool Tout on Wednesday, but he formally -- or more accurately, traditionally -- announced it today in a meeting with the media at his Orlando-area home. The Big Sobriquet's sign-off has prompted discussion of Shaq's place in the history of the league and in the pantheon of all-time great centers.
The list is fungible, but Shaq is among my top five centers of all-time. The Big Three of NBA big men are non-negotiable -- Bill Russell, Wilt Chamberlain and Kareem Abdul-Jabbar -- after that it's in the eye of the beholder among Moses Malone, Shaq, Hakeem Olajuwon and David Robinson to round out the starting five.

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