CHARLOTTE — Luke Walton was named the Western Conference Coach of the Month on Tuesday, an announcement from the NBA that might seem obvious were it not for the fact that the Warriors' interim head coach has yet to win a game. Sure, the Warriors are 19-0 — the best start in NBA history — But those victories are being awarded to head coach Steve Kerr, who is on a leave of absence while recovering from two offseason back surgeries (one of which resulted in a spinal-fluid leak). The NBA clarified its rules Tuesday, saying the head coach of record will continue to be credited with a team's wins and losses, but that any head coach, interim head coach or acting head coach is eligible to be recognized with league coaching awards. Kerr has said the policy of not awarding wins and losses to interim coaches was "ridiculous," but said he answered the question before knowing the history that created the precedent. Once he learned why the rule was created — stories like that of Don Nelson, who would be dropped from the No. 1 spot among the league's all-time winningest coaches, if the handful of games he missed were granted to an interim coach — Kerr rescinded his...