The Triple-A Norfolk Tides fell to the Gwinnett Braves, and the Double-A Bowie Baysox were edged by the Erie SeaWolves.
The Single-A Frederick Keys topped the Potomac Nationals, and the Single-A Delmarva Shorebirds beat the Hagerstown Suns in extra innings.
Score: Gwinnett Braves 4, Norfolk Tides 2 (Box score)
Recap: Starting pitcher Jake Arrieta held the Braves to two runs (one earned) and five hits in six innings, but he didn't factor in the decision as the Tides suffered a 4-2 loss at Harbor Park.
Norfolk relief pitcher Ross Wolf (0-1) was charged with two unearned runs and three hits in two innings and left-hander Alberto Castillo tossed a scoreless frame.
Tides center fielder Joey Gathright collected two hits, two stolen bases and an RBI, and right fielder Jonathan Tucker added a double, an RBI and a run scored.
Shortstop Scott Moore committed his sixth error of the season for Norfolk.Bowie Baysox (AA)
Score: Erie SeaWolves 5, Bowie Baysox 3 (Box score)
Recap: Center fielder Miguel Abreu hit a solo home run for the Baysox, but they lost their second straight game, 5-3, to Erie.
Bowie designated hitter Paco Figueroa and shortstop Pedro Florimon each collected an RBI, while third baseman Brandon Waring hit a double.
Starting pitcher Steve Johnson (0-1) allowed five runs and six hits, including three home runs for the Baysox, but relief pitcher Zach Clark tossed four scoreless innings.
Calvert Hall graduate Jon Kibler (1-2) held the Baysox to three runs (two earned) and five hits in seven innings to earn the victory for the SeaWolves.
Score: Frederick Keys 8, Potomac Nationals 5 (Box score)
Recap: First baseman Joe Mahoney was 2-for-4 with a solo home run in the Keys' 8-5 win over Potomac, and right fielder Ronnie Welty added a two-run shot.
Frederick center fielder Xavier Avery and shortstop Michael Mooney each added two hits and two RBIs, and left fielder Kyle Hudson was 2-for-5 with an RBI and a run scored.
Starting pitcher Rick Zagone allowed four runs (two earned) and four hits in five innings for the Keys, and relief pitcher Brett Bordes (1-0) picked up the victory despite giving up one run, two hits and two walks in one-plus inning.
Keys right-hander Sean Gleason tossed three scoreless innings to earn his second save of the season.
Score: Delmarva Shorebirds 3, Hagerstown Suns 2, 11 innings (Box score)
Recap: Left fielder T.J. Baxter scored all the way from second base on a wild pitch in the bottom of the 11th inning to give the Shorebirds a 3-2 victory over Hagerstown at Arthur W. Perdue Stadium.
Baxter and center fielder Michael Planeta each collected two hits for Delmarva.
Shorebirds starting pitcher Jake Cowan allowed two runs and six hits in seven innings. The 21-year-old right-hander struck out seven batters and issued two walks.
Relief pitcher Ryan Palsha (1-0) held the Suns to one hit in four scoreless innings to earn the win for the Shorebirds.