NBA Primary LogoNBA Alternate LogoNBA Wordmark LogoNBA Team History Who is the greatest center in the NBA of All-time? Patrick Ewing Walt Bellamy George Mikan Robert Parish Dwight Howard Dave Cowens Kareem Abdul-Jabbar Hakeem Olajuwon Elvin Hayes Nate Thurmond Bill Russell Dikembe Mutombo Willis Reed Shaquille O’Neal Bob McAdoo Wilt Chamberlain Wes Unseld Bill Walton Moses Malone David Robinson Poll …