The Triple-A Norfolk Tides lost to the Charlotte Knights, and the Double-A Bowie Baysox were beaten by the Portland Sea Dogs.
The Single-A Frederick Keys fell to the Winston-Salem Dash, and the Single-A Delmarva Shorebirds were edged by the Savannah Sand Gnats.
The short-season Single-A Aberdeen IronBirds were pounded by the Jamestown Jammers, and the Rookie-level Bluefield Orioles were defeated by the Princeton Rays.
If you're keeping track at home, the affiliates in the Orioles' minor league system were 0-6 in Friday's games. That's not a good start to the weekend.
Speaking of the weekend, I'm heading to Kings Dominion for the next two days. I'm going to attempt to still write game recaps at night -- as long as the wireless Internet in the hotel room works -- but there won't be any game previews.
Score: Charlotte Knights 3, Norfolk Tides 1 (Box score)
Recap: Starting pitcher Jake Arrieta (4-6) allowed three runs (two earned) and six hits in six innings during the Tides' 3-1 loss to Charlotte.
The 23-year-old right-hander threw 63 of his 103 pitches for strikes, and he collected five strikeouts. Arrieta's ERA in 13 starts for the Tides is 4.59.
Norfolk third baseman Brandon Pinckney was 2-for-3 with an RBI, and shortstop Blake Davis scored the team's only run.
Tides left fielder Freddy Guzman picked up two stolen bases.Bowie Baysox (AA)
Score: Portland Sea Dogs 4, Bowie Baysox 1 (Box score)
Recap: Center fielder Danny Figueroa was 3-for-4 with a double and a run scored, but the Baysox suffered a 4-1 loss to Portland at Prince George's Stadium.
Bowie third baseman Josh Bell hit a sacrifice fly, and designated hitter Paco Figueroa was 1-for-1 with three walks.
Baysox starting pitcher Steve Johnson gave up one run and four hits in six innings. The 21-year-old right-hander struck out five batters and issued two walks in his first start in front of the home crowd.
Relief pitcher Ryan Ouellette (4-4) allowed two runs, one hit and two walks in two-thirds of an inning for the Baysox.
Score: Winston-Salem Dash 4, Frederick Keys 1 (Box score)
Recap: Left fielder David Cash was 1-for-4 with an RBI in the Keys' 4-1 loss to Winston-Salem at Harry Grove Stadium.
Frederick first baseman Brandon Waring was 1-for-2 with two walks, and catcher Caleb Joseph scored the only run for the home team.
Keys starting pitcher Kenny Moreland (3-1) gave up four runs and five hits in 5 1/3 innings. The 23-year-old right-hander struck out three batters and issued one walk.
Shortstop Pedro Florimon Jr. committed his 29th error of the season for the Keys.
Frederick designated hitter Matthew Tucker and manager Richie Hebner were both ejected in the ninth inning.
Score: Savannah Sand Gnats 5, Delmarva Shorebirds 4 (Box score)
Recap: First baseman Joe Mahoney was 3-for-5 with a double and two RBIs in the Shorebirds' 5-4 loss to Savannah.
Delmarva center fielder Xavier Avery contributed two hits and a run scored, and third baseman Tyler Kolodny added a double and a run scored.
Shorebirds starting pitcher Cole McCurry gave up two runs (one earned), five hits and four walks in six innings, while relief pitcher Brett Bordes (2-2) allowed three runs (one earned), one hit and four walks in 1 2/3 innings.
Left fielder Kyle Hudson was 1-for-3 with a stolen base and a run scored for the Shorebirds.
Score: Jamestown Jammers 12, Aberdeen IronBirds 5 (Box score)
Recap: Starting pitcher Tyler Sexton (2-6) gave up eight runs (six earned), eight hits and four walks in 3 1/3 innings as the IronBirds lost, 12-5, to Jamestown.
Aberdeen first baseman T.J. Baxter was 3-for-4 with a triple and an RBI, and second baseman Buck Britton added three hits and an RBI.
Center fielder Steve Bumbry was 1-for-2 with two walks and a run scored for the IronBirds, and shortstop Garabez Rosa contributed a triple, an RBI and a run scored.
Score: Princeton Rays 8, Bluefield Orioles 2 (Box score)
Recap: Second baseman Omar Casamayor was 2-for-5 with a double and an RBI in the Orioles' 8-2 loss to Princeton.
Bluefield catcher Dashenko Ricardo was 1-for-3 with an RBI and a run scored, and designated hitter Edinho Meyer added a triple and a run scored.
Orioles pitcher Justin Anderson (2-1) made his first professional start and allowed three runs (one earned) and three hits in three innings. The 21-year-old left-hander made 10 relief appearances for Bluefield before getting the nod for tonight's start.
Third baseman Mike Flacco was 1-for-2 with two walks and a stolen base for Bluefield.