ATLANTA — David Ross hit his second career grand slam and the Atlanta Braves held on for a 5-4 victory over the Baltimore Orioles on Saturday night.

Tim Hudson pitched six innings and Jordan Schafer made a couple of nice plays in center field, helping Atlanta to its fifth consecutive win and 10th in its last 12 games overall.

Mark Reynolds hit two first-pitch homers for Baltimore, including a two-run shot to center field in the fourth. Reynolds’ 17th homer landed about 10 rows deep in the left-field seats in the sixth.

Nick Markakis’ seventh-inning homer off Scott

Linebrink trimmed Atlanta’s lead to 5-4, but the Orioles (35-45) couldn’t complete the rally. They have lost five straight and are 10 games below .500 for the first time this season.

Markakis, the former Woodstock High School standout, finished with three hits one day after he his career-best 19-game hitting streak.

The Braves scored all their runs in the fourth, taking advantage of a key mistake by Luke Scott. Dan Uggla hit a sinking liner to left with two out but Scott dropped it. Uggla was awarded an RBI single.

After Jake Arrieta (9-5) walked Nate McLouth to load the bases, Ross hit a drive into the left-field seats to give Atlanta a 5-2 lead. It was Ross’ fourth homer of the season.

Baltimore had runners on second and third with two out in the eighth, but Markakis flied out to left against Eric O’Flaherty. Craig Kimbrel pitched the ninth for his 24th save.