They often hear him arrive at work from upstairs in the Warriors executive offices, the thundering vroom of his Harley Davidson a telltale sign. Mike Brown rolled in on his Bay Area bike - he has another in Cleveland - one day last week, and since the practice he was leading between playoff games would be short, he never bothered to change out of his beige Harley-logo T-shirt and dark jeans. Somehow, the veteran NBA coach filling in for the Warriors has found a way to beautifully blend being his distinctive self with carrying on the way reigning NBA Coach of the Year Steve Kerr would do it if he were here and healthy.