These metrics have been available elsewhere for years, on sites like, and League officials said they were motivated not necessarily to catch up to the independent sites, but rather by the desire to give fans better tools to analyze the game. “What drove us is to make sure that the record was straight,” said Steve Hellmuth, the league’s executive vice president for operations and technology. “In other words, these are the official statistics, directly from the N.B.A., and they’re accurate.”