How long will Mike Brown serve as Warriors' interim head coach? In July, after Luke Walton left to become the Lakers' head coach, the Warriors made a curious hire: Many wondered why Steve Kerr would replace an offensive-minded assistant with Brown, a defensive guru, when Golden State already had Ron Adams — arguably the NBA's top defensive assistant — on staff. More than a detail-oriented coach adept at crafting rotations and practice plans, Brown is a worthy insurance option should Kerr miss extended time. In 2009, after guiding the Cavaliers to 66 regular-season wins, he was named NBA Coach of the Year. Though a team spokesman said Kerr isn't sure if his current symptoms are related to that back surgery, Kerr was in bad enough shape Saturday to miss shoot-around and, ultimately, a playoff game. Thanks to a hire that surprised many last summer, it is also better positioned than its counterparts to overcome the absence of a reigning NBA Coach of the Year. After missing Game 3, the statuses of Durant (left calf strain), Shaun Livingston (right index finger sprain) and Matt Barnes (right ankle/foot sprain) remain up in the air for Game 4 on Monday.