Taking profit of the numerous statistics on basketball games, we propose a team efficiency rate well related with the ranking of the teams after the regular season. This "objective" efficiency rate is different from the standard efficiency rate used to assess the player performances. The ability of this objective team efficiency rate to recover the season ranking is illustrated for the French PRO A championship and for the NBA championship. Moreover, analyzing the scores we get for the players with this "objective" efficiency rate lead us to propose a specific objective player efficiency rate to better take into account their performances.