You should be happy, he had a triple double ;)
Seriously now, the GS affects his performance level in general, so it does result in higher turnover rate (for a player who already is a little turnover-prone). Also bear in mind that he played 48 minutes straight, so fatigue will also decrease his performance level. If you're worried about too many turnovers you can try reducing the pace of the game and using low post instead of look inside