By Dan Levine OAKLAND, Calif. - Now that the Golden State Warriors have set the NBA record for most wins during a regular season, the team must grapple with an even bigger challenge: winning a second consecutive championship. The Warriors, led by reigning NBA Most Valuable Player Stephen Curry, finished the season at 73-9 after decimating the middling Memphis Grizzlies 124-104 on Wednesday. The win moved them ahead of the 1995-96 Chicago Bulls, who had previously held the single season record for victories with 72.