The Triple-A Norfolk Tides were edged by the Gwinnett Braves, and the Double-A Bowie Baysox were handed another loss by the Erie SeaWolves.
The Single-A Frederick Keys topped the Potomac Nationals, and the Single-A Delmarva Shorebirds picked up another exciting win over the Greensboro Grasshoppers.
Score: Gwinnett Braves 2, Norfolk Tides 1 (Box score)
Recap: Second baseman Scott Moore was 0-for-4 with his seventh error of the season for the Tides in their 2-1 loss to Gwinnett at Harbor Park.
Norfolk third baseman Josh Bell hit a single and is batting .191 in 12 games this season, while first baseman Brandon Snyder was 0-for-4, lowering his batting average to .174 in 13 games in 2010.
Each player also committed his third defensive miscue in the loss.
Tides starting pitcher Alfredo Simon (1-1) held the Braves to two runs (one earned) and six hits in seven innings, but he suffered the loss. The 28-year-old right-hander struck out five batters and issued three walks.
Shortstop Robert Andino was 2-for-4 with a double and an RBI for the Tides, and left fielder Jeff Salazar also collected two hits.Bowie Baysox (AA)
Score: Erie SeaWolves 7, Bowie Baysox 2 (Box score)
Recap: Right fielder Paco Figueroa was 3-for-4 with a two-run home run, but the Baysox committed four errors in a 7-2 loss to Erie.
Bowie catcher Caleb Joseph was 0-for-3 with two errors, while third baseman Brandon Waring and shortstop Pedro Florimon each committed one defensive miscue.
Baysox starting pitcher Chorye Spoone (1-1) allowed four runs (two earned) and six hits in 4 2/3 innings. The 24-year-old right-hander issued four walks, hit one batter and collected one strikeout.
First baseman Robbie Widlansky had Bowie's only other hit.
Score: Frederick Keys 6, Potomac Nationals 1 (Box score)
Recap: Second baseman Buck Britton was 2-for-5 with a home run and three RBIs in the Keys' 6-1 win over Potomac.
Frederick right fielder Ronnie Welty and designated hitter L.J. Hoes each added two hits and an RBI, and left fielder Jacob Julius was 3-for-3 with a stolen base and two runs scored.
Keys starting pitcher Ryan O'Shea (1-2) gave up one run and three hits in five innings to earn the victory. The 23-year-old right-hander struck out two batters and issued three walks.
Third baseman Billy Rowell was 0-for-5 with a throwing error for Frederick.
Score: Delmarva Shorebirds 1, Greensboro Grasshoppers 0 (Box score)
Recap: Shortstop Garabez Rosa hit a walk-off home run to lead the Shorebirds over Greensboro, 1-0, at Arthur W. Perdue Stadium.
Delmarva starting pitcher Matt Hobgood allowed only two hits and one walk in seven scoreless innings. The 19-year-old right-hander struck out six batters.
Relief pitcher Jacob Smith (3-0) tossed the final two innings, giving up one hit and one walk, to pick up the victory for the Shorebirds.
Shorebirds first baseman Tyler Townsend was 1-for-3 in his season debut.