Long after the Cardinals’ 4-3 win over the Atlanta Braves on Monday night at sparsely populated Turner Field, center fielder Peter Bourjos finally emerged at his locker. He was one of those chosen for postgame drug testing, according to the Major League Baseball program, and no, it was not because he got his first two hits in three weeks. “It was random,” said Bourjos, with a smile, something which probably has been hard for him to do lately as his playing time eroded in the midst of offensive struggles that had dragged his average to .154. But his two singles, one on which he didn’t mean to swing and one when he did, keyed back-to-back scoring innings for the Cardinals in the fifth and sixth, and four relievers maintained the victory for righthander Shelby Miller. It was the fourth win in a row for Miller, who did a quick fade in the sixth inning after pitching around trouble to blank the Braves for the first five. The loss was the seventh in a row for the Braves, who rallied for two runs against Miller and one against Kevin Siegrist. Otherwise, they were stymied by Pat Neshek, Carlos Martinez and Trevor Rosenthal, although the Braves advanced the tying run to second in the ninth. With a base open and lefthanded-hitting Jason Heyward the hitter, manager Mike Matheny convened a summit at the mound. The decision, presumably, was made to pitch cautiously to Heyward with righthanded-hitting Justin Upton up next and, indeed, Rosenthal walked Heyward on five pitches. He fanned Upton on four, including an outside-corner fastball on which Upton couldn’t pull the trigger on strike three. Rosenthal, saving his second game in two nights, is nine for nine in preservation opportunities. Bourjos, who had been nothing for 19 before his hits, was given his first start in more than a week. But he was 4 for 10 with a single, double, triple and homer in his career against Atlanta starter Aaron Harang, and Bourjos was hopeful that would put him in good stead with Matheny. In the fifth, Bourjos tried to stop his swing but singled to center. Then, while trying to steal second, Bourjos got close enough to harry shortstop Andrelton Simmons, who was trying to make a double play he probably didn’t have on Mark Ellis’ grounder near the bag, booting the ball for an error. Bourjos said he probably would have been safe. “I felt like (Simmons’) only play was going to be to first,” said Bourjos. “We got a good break right there. He was probably trying to rush it, to get it to second base.”