Frederick left fielder Kyle Hudson was 1-for-3 with a two walks, a stolen base and two runs scored, and shortstop Greg Miclat added two singles, a stolen base and a run scored as both players made their debuts with the team.
Keys starting pitcher Sean Gleason (4-8) gave up six runs (five earned), seven hits and three walks in 4 2/3 innings.
Right fielder Robbie Widlansky contributed an RBI and a stolen base for the Keys, and third baseman Buck Britton was 1-for-4 with a stolen base.
Delmarva Shorebirds (A)
Score: Lake County Captains 3, Delmarva Shorebirds 1 (Box score)
Recap: First baseman Elvin Polanco hit a pair of doubles in the Shorebirds' 3-1 loss to Lake County at Arthur W. Perdue Stadium.
Delmarva designated hitter Mike Flacco was 0-for-3 with two strikeouts and he was hit by a pitch in his Single-A debut, and shortstop Gary Helmick was also hitless in three at-bats during his first game with the team.
Shorebirds left fielder Jacob Julius was 3-for-4 with a triple and a run scored, and second baseman L.J. Hoes added a single and a double.
Starting pitcher Nicholas Haughian (0-1) allowed three runs and six hits in 5 2/3 innings during his first start with the Shorebirds.
Recap: Designated hitter Tyler Townsend contributed two doubles, an RBI and a run scored in the IronBirds' 5-4 loss to Staten Island.
Aberdeen third baseman Tyler Kelly was 2-for-5 with a run scored, and left fielder Richard D'Oleo was 1-for-1 with an RBI and a run scored after entering the game as a pinch runner in the eighth inning.
IronBirds starting pitcher Jake Cowan struck out six batters and allowed three hits in five scoreless innings, and relief pitcher Josh Dowdy (1-3) was charged with three runs, two hits and three walks in two-thirds of an inning.