The Triple-A Norfolk Tides edged the Rochester Red Wings, and the Double-A Bowie Baysox topped the Richmond Flying Squirrels in extra innings.
The Single-A Frederick Keys couldn't complete their comeback over the Myrtle Beach Pelicans, and the Single-A Delmarva Shorebirds were routed by the Lakewood BlueClaws.
Score: Norfolk Tides 2, Rochester Red Wings 1 (Box score)
Recap: Starting pitcher Jake Arrieta (6-2) gave up one run and five hits in eight innings as the Tides held on for a 2-1 win on the road against Rochester.
Arrieta struck out seven batters and issued two walks, throwing 66 of his 106 pitches for strikes. He lowered his International League-leading ERA to 1.77 in 11 starts.
Norfolk shortstop Robert Andino hit a solo home run in the eighth inning, and second baseman Blake Davis collected two hits in the victory.
Tides relief pitcher Dennis Sarfate retired the side in order in the ninth to pick up his third save of the year.Bowie Baysox (AA)
Score: Bowie Baysox 3, Richmond Flying Squirrels 2, 11 innings (Box score)
Recap: Shortstop Carlos Rojas hit an RBI single -- one of his two hits in the game -- with one out in the top of the 11th inning to lift the Baysox to a 3-2 win over Richmond.
Bowie relief pitcher Pedro Beato (3-0) held the Flying Squirrels to one hit in three scoreless innings to pick up the victory, while starting pitcher Zach Britton was charged with two runs and six hits in 6 1/3 innings.
Baysox designated hitter Steven Lerud was 2-for-5 with a double, an RBI and a run scored, and left fielder Jonathan Tucker added two hits.
Center fielder Danny Figueroa collected an RBI for Bowie.
Score: Myrtle Beach Pelicans 4, Frederick Keys 3 (Box score)
Recap: Catcher Brian Ward was 2-for-4 with a pair of doubles and two RBIs, but the Keys' ninth-inning rally came up short in a 4-3 loss to Myrtle Beach at Harry Grove Stadium.
Frederick starting pitcher Nathan Nery (3-5) only allowed three runs and five hits in eight innings, but he was outdueled by Myrtle Beach's Julio Teheran, who struck out 14 Keys batters in eight shutout frames.
Keys second baseman Miguel Abreu contributed three hits and a run scored, while third baseman Buck Britton was 2-for-4 with a double, an RBI and a run scored.
In his return to the lineup after being removed from the roster last week, Frederick designated hitter Billy Rowell was 0-for-4 with four strikeouts. He is now batting .248 in 40 games this season.
Score: Lakewood BlueClaws 14, Delmarva Shorebirds 3 (Box score)
Recap: Starting pitcher Kenny Moreland (0-2) was charged with six runs and nine hits in five-plus innings as the Shorebirds were pounded, 14-3, by Lakewood at Arthur W. Perdue Stadium.
Delmarva designated hitter Kieron Pope was 3-for-5 in the loss, while catcher Michael Ohlman added two hits, including a solo home run.
Shorebirds second baseman Tyler Kelly contributed two singles and two RBIs, and first baseman T.J. Baxter hit a triple.
Relief pitcher Brent Allar gave up five runs, five hits and two walks in one inning for the Shorebirds.