The Triple-A Norfolk Tides lost to the Gwinnett Braves, and the Double-A Bowie Baysox were beaten by the Akron Aeros.
The Single-A Frederick Keys were swept in a doubleheader by the Wilmington Blue Rocks.
The Rookie-level Bluefield Orioles topped the Bristol Sox, and the Rookie-level GCL Orioles were edged by the GCL Twins in extra innings.
The Single-A Delmarva Shorebirds were idle, and three players from the short-season Single-A Aberdeen IronBirds participated in the New York-Penn League All-Star Game.
In addition to the earlier roster moves, the Keys also activated right-hander Chorye Spoone from the disabled list. To make room on the roster, Frederick placed left-hander Nathan Nery on the disabled list, retroactive to Aug. 16.
Score: Gwinnett Braves 7, Norfolk Tides 4 (Box score)
Recap: Second baseman Melvin Dorta was 3-for-3 with a walk and a run scored in the Tides' 7-4 loss to Gwinnett at Harbor Park.
Norfolk third baseman Justin Turner was 3-for-4, and left fielder Freddy Guzman added a triple, two stolen bases, an RBI and a run scored.
Tides starting pitcher Chris Waters gave up one run and three hits in 5 2/3 innings, and relief pitcher Alberto Castillo (2-2) allowed five unearned runs, three hits and two walks in one inning.
Shortstop Blake Davis was 2-for-4 with a triple and an RBI for the Tides.Bowie Baysox (AA)
Score: Akron Aeros 12, Bowie Baysox 3 (Box score)
Recap: Third baseman Josh Bell was 2-for-4 with a two-run home run, but the Baysox were pounded, 12-3, by Akron.
Bowie starting pitcher Brandon Erbe gave up two runs (one earned), three hits and three walks in four innings, and relief pitcher Jim Hoey (2-5) allowed four runs (three earned) and four hits in one inning.
Baysox left fielder Jonathan Tucker was 2-for-4 with a double and a run scored, and designated hitter Paco Figueroa added two hits and a stolen base.
Game 1 score: Wilmington Blue Rocks 6, Frederick Keys 5, 7 innings (Box score)
Game 1 recap: Shortstop Pedro Florimon Jr. was 2-for-3 with a double, three RBIs and a run scored as the Keys were edged by Wilmington, 6-5, in the first game of the doubleheader at Harry Grove Stadium.
Frederick center fielder Matt Angle was 1-for-3 with an RBI, a stolen base and two runs scored, while first baseman Robbie Widlansky added a single and an RBI.
Keys starting pitcher Rick Zagone allowed five runs (three earned) and four hits in three innings, and relief pitcher Brian Parker (4-1) gave up one run and three hits in three innings.
Game 2 score: Wilmington Blue Rocks 4, Frederick Keys 2, 7 innings (Box score)
Game 2 recap: Third baseman Brandon Waring hit his 23rd home run of the season, a two-run shot in the sixth inning, but the Keys were swept in the doubleheader after a 4-2 loss to Wilmington.
Florimon added two doubles and a run scored for the Keys, but he also committed three of the team's six errors in the game.
Frederick starting pitcher Pat Egan (1-3) allowed three runs (two earned) and six hits in 3 1/3 innings, and relief pitcher Jake Stevens gave up one unearned run and two hits in 3 2/3 innings.
Keys left fielder Tyler Henson was 1-for-3 with a double.
Score: Bluefield Orioles 6, Bristol Sox 1 (Box score)
Recap: Center fielder Michael Planeta was 2-for-4 with a three-run home run and two runs scored in the Orioles' 6-1 victory over Bristol at Bowen Field.
Bluefield designated hitter Kipp Schutz was 3-for-4 with a double and a run scored, and first baseman Mike Flacco added a double and an RBI.
Orioles third baseman Corey Thomas contributed two hits and an RBI, and catcher Dashenko Ricardo was 1-for-3 with a triple and a run scored.
Starting pitcher Jesse Beal (5-3) allowed one run and six hits in six innings for the Orioles. The 19-year-old right-hander struck out three batters and didn't walk anyone.
Score: GCL Twins 2, GCL Orioles 1, 11 innings (Box score)
Recap: Shortstop Moises Ciriaco was 2-for-4 with a stolen base and a run scored in the Orioles' 2-1 loss to the Twins in 11 innings.
Orioles starting pitcher Angel Cespedes gave up one run and three hits in seven innings. The 19-year-old right-hander collected four strikeouts, issued one walk and hit a batter.
Catcher Dennis Perez was 1-for-3 with an RBI for the Orioles.
Orioles relief pitcher Chris Hervey (1-1) allowed one run, one hit, one walk and he hit a batter in two-thirds of an inning.
Score: American League All-Stars 4, National League All-Stars 2 (Box score)
Recap: IronBirds relief pitcher Jacob Smith earned the win for the American League All-Stars in a 4-2 victory over the National League All-Stars in State College, Pa., after tossing one scoreless inning.
Aberdeen infielder Tyler Kelly was 1-for-3 with a double and a run scored, and infielder Levi Carolus was 0-for-1.
Staten Island Yankees second baseman Jimmy Paredes was named as the game's Most Valuable Player after going 1-for-2 with a two-run home run in the seventh inning.