Steve Kerr, 3rd season with Warriors (140-24 with Warriors and overall); Luke Walton, 1st season with Lakers (0-0 with Lakers and overall) On air: CSN Bay Area and NBA TV; Radio on 95.7 FM Warriors injury report: PF David West (rest), SF Andre Iguodala (rest), C Damian Jones (right pectoral surgery) and SG Elliot Williams (right knee surgery) are out. Nuggets injury report: PG José Calderón (slight left calf strain) and SG Lou Williams (rest) are out. An assistant under Steve Kerr for two years, Walton parlayed his 39-4 record as the Warriors' interim head coach last season into the Lakers' job. [...] Walton told reporters Friday that, at this point in the preseason, he is more focused on getting his players to buy into his defensive system. Mike Brown, who replaced Walton as Kerr's top assistant, was the Lakers' head coach from 2011 to '12. After not attempting more than eight shots in each of the Warriors' first three preseason games, the two-time MVP went 7-for-17 in Denver for a game-high 22 points. Though it was probably wise for him to defer to Durant early, Curry will need to be aggressive for Golden State to maximize its firepower in the regular season....