The San Antonio Spurs hardly looked like an aging team playing the second night of a back-to-back. But the Memphis Grizzlies sure appeared to be a team still in a haze from a four-game road trip. Matt Bonner scored 15 points, going 5 of 9 from outside the arc, and Tim Duncan added 14 points as San Antonio sent Memphis to its fourth straight loss with an 83-73 victory over the Grizzlies on Monday night.