The Triple-A Norfolk Tides beat the Charlotte Knights, and the Double-A Bowie Baysox blew a lead against the Akron Aeros.
The Single-A Frederick Keys were pounded by the Salem Red Sox, and the Single-A Delmarva Shorebirds topped the Hagerstown Suns.
Score: Norfolk Tides 4, Charlotte Knights 2 (Box score)
Recap: Starting pitcher Jake Arrieta (2-0) struck out 11 batters in seven scoreless innings as the Tides topped Charlotte, 4-2. The 24-year-old right-hander allowed two hits and issued one walk.
Norfolk third baseman Scott Moore was 2-for-3 with a three-run home run, and catcher Adam Donachie added a solo shot.
Tides designated hitter Josh Bell was 0-for-4 with two strikeouts.
Relief pitcher Frank Mata was charged with one run, one hit and two walks in one inning, but he picked up his third save of the season for the Tides.Bowie Baysox (AA)
Score: Akron Aeros 8, Bowie Baysox 6 (Box score)
Recap: Relief pitcher Wilfrido Perez (0-1) allowed three runs and two hits in the ninth inning as the Baysox lost, 8-6, to Akron at Prince George's Stadium.
Perez holds a 10.80 ERA in five appearances this season. Opponents are batting .364 against him.
Bowie starting pitcher Steve Johnson gave up five runs and five hits in five innings, but he was in line for the victory before Perez's blown save.
Baysox designated hitter Joel Guzman hit a three-run home run, and right fielder Paco Figueroa was 3-for-4 with a double, an RBI and two runs scored.
Score: Salem Red Sox 10, Frederick Keys 3 (Box score)
Recap: Relief pitcher Raul Rivero (0-1) was touched up for six runs (five earned), three hits and three walks in 1 1/3 innings in the Keys' 10-3 loss to Salem at Harry Grove Stadium.
Keys left fielder Xavier Avery was 3-for-5 with a run scored, raising his batting average to .407 in 15 games, and third baseman Billy Rowell added two hits and a run scored.
Frederick starting pitcher Rick Zagone gave up three runs (two earned) and five hits in 5 2/3 innings, but he didn't factor in the decision.
Score: Delmarva Shorebirds 9, Hagerstown Suns 3 (Box score)
Recap: First baseman Tyler Stampone and catcher Luis Bernardo each collected three RBIs in the Shorebirds' 9-3 victory over Hagerstown.
Delmarva third baseman Tyler Kolodny was 2-for-4 with two RBIs, two runs scored and a stolen base, and center fielder Steve Bumbry added two hits.
Shorebirds starting pitcher Jake Cowan (2-0) held the Suns to three runs (two earned) and six hits in six innings. The 21-year-old right-hander struck out eight batters and issued two walks.