Baysox right fielder Joe Nowicki was 2-for-4 with a run scored, and left fielder Tyler Henson contributed a single, an RBI and a run scored.
Starting pitcher Fredy Deza (6-7) gave up four runs and nine hits in five innings for the Baysox, and relief pitcher Luis Lebron earned his seventh save since joining the team after tossing a scoreless inning.
Frederick starting pitcher Rick Zagone allowed two runs (one earned) and six hits in 5 2/3 innings, but he didn't factor in the decision. The 22-year-old left-hander struck out nine batters and issued two walks.
Relief pitcher Jake Stevens (5-6) earned the win after picking up three strikeouts and giving up one hit in two scoreless innings for Frederick.
Keys right fielder Billy Rowell was 0-for-3 with a walk, and the 20-year-old outfielder committed his 15th error of the season. Rowell is batting .222 with nine home runs, 38 RBIs and 116 strikeouts in 116 games for Frederick in 2009.