For the first time in their franchise’s 17-year history, the Memphis Grizzlies have earned homecourt advantage in a playoff series. That said, simply having a deciding game in their building probably won’t get them any closer to victory without taking these factors into consideration: THE HEALTH FACTOR: Zach Randolph was the catalyst for the Memphis Grizzlies’ improbable upset of the top-seeded San Antonio Spurs in last year’s NBA playoffs. After missing 38 games this season, he seems to be rounding into