By Henry Abbott Popovich gets the same unproven players every team gets -- in fact, he gets worse ones. The Spurs haven't had a lottery pick since Tim Duncan in 1997. Nevertheless, he plays young players relentlessly and aggressively all season long. He plays young unproven players when his team is ahead. He plays them when his team is behind. He plays them when his team is in first place and when they're in last. He plays them in all four quarters and in overtime. And, most importantly, he does it season after season.