On Friday night, the Spurs seemed to have turned a corner, but it just may have been into a blind alley, as they played their worst game of the season on Sunday afternoon against the Pistons. Two nights after shutting down Kawhi Leonard and Paul George, they couldn’t slow down Luke Kennard or Christian Wood, who scored 28 points in 22 minutes off the bench. LaMarcus Aldridge was out with thigh soreness, but his absence couldn’t account for the defensive collapse that allowed Detroit to score 132 points against the Silver and Black.