Duren (undisclosed) is not present for the Pistons' open practice Saturday, Eric Vincent of ClutchPoints.com reports.
Analysis:Duren signed a five-year, $200 million contract with the Pistons on Thursday after an offseason of negotiating. It's unclear exactly why the big man isn't at Saturday's practice, though he can be considered questionable for Detroit's preseason opener against the Suns on Monday.
