Kerr, 51, first hurt his back during the 2015 NBA Finals, and subsequent surgeries and associated pain kept him sidelined for the first 43 games of last season. The pain and headaches returned after Game 2 of the Warriors' first-round matchup against the Portland Trail Blazers last month, and assistant coach Mike Brown has filled in during his absence. "He was at Duke, he had the procedure done Friday," Myers told reporters in Salt Lake City on Sunday, where the Warriors currently hold a 3-0 lead over the Utah Jazz in the best-of-seven series.