The Triple-A Norfolk Tides lost in the final at-bat against the Pawtucket Red Sox, while the Double-A Bowie Baysox dropped the game to the Harrisburg Senators in extra innings.
The Single-A Delmarva Shorebirds continued to play shaky defense in a defeat against the Hickory Crawdads, while the Single-A Frederick Keys were idle.
Score: Pawtucket Red Sox 5, Norfolk Tides 4 (Box score)
Recap: Relief pitcher Kam Mickolio (1-1) allowed a three-run walk-off home run to Pawtucket catcher Dusty Brown as the Tides suffered a 5-4 loss in heartbreaking fashion.
Norfolk starting pitcher Chris George shined in 6 2/3 innings. The 30-year-old left-hander held the Red Sox to two runs and four hits in the no-decision.
Tides shortstop Robert Andino was 3-for-4 with two doubles and two RBIs, while second baseman Blake Davis added two hits and a run scored.
Score: Harrisburg Senators 10, Bowie Baysox 9, 10 innings (Box score)
Recap: Three home runs weren't enough as the Baysox rallied, but ultimately fell, 10-9, to Harrisburg in 10 innings on the road tonight.
Designated hitter Joel Guzman hit a three-run home run in the eighth inning as part of a 17-hit attack for the Baysox, while catcher Caleb Joseph and second baseman Ryan Adams each added a two-run shot.
Bowie starting pitcher Steve Johnson was touched up for five runs, three hits and five walks in four innings. He also hit a batter, but didn't factor in the decision.
Baysox center fielder Matt Angle was 3-for-5 with a double, an RBI and two runs scored, and six other players had two hits each.
Relief pitcher Mike Hinckley (0-1) was charged with the loss for Bowie after allowing the winning run to score in the 10th.
Score: Hickory Crawdads 3, Delmarva Shorebirds 1 (Box score)
Recap: The Shorebirds committed four errors in a 3-1 loss to Hickory.
Delmarva starting pitcher Luis Noel (0-2) made two of the defensive miscues, and he allowed three runs (one earned) and five hits in six innings.
Shorebirds first baseman Tyler Stampone and second baseman Gary Helmick each had an error in the defeat.
Helmick also collected two hits in the game, while designated hitter Kieron Pope was 2-for-4 with an RBI for the Shorebirds.
Center fielder Steve Bumbry hit a double for Delmarva.