Steve Kerr joked around on what became a post-mosh Monday, feeling some of the natural pressure before his Golden State Warriors get going at last with all the weight of trying to win another NBA championship on their star-studded shoulders. The reigning NBA Coach of the Year said he cut short practice given Kevin Durant's jostling in the mosh pit at a Kanye West concert the previous evening. ''He got a great workout last night,'' Kerr said with a smile.