Atholton, Howard and Reservoir combined to score 35 runs in wins over Oakland Mills, Parkville and Wilde Lake, respectively, on opening day.
The Raiders shut out Oakland Mills, 14-0, scoring seven runs each in the second and fourth innings.
Brady Acker and Jordan Patterson scored two runs each on two hits, and combined for three RBIs. Each player also drew a walk. Sophomore Blake James doubled and senior Dan McCann drove in three runs. As a team, Atholton drew eight walks and were hit by pitches three times.
Acker stole two bases on Saturday, and has still never been caught stealing in his high school career.
Senior ace Michael Slayton struck out five and allowed only two hits in four innings, combining with James — who struck out the side in the fifth — for the shut out.
Elsewhere on opening day, St. Mary's edged Long Reach, 7-6.
Lightning junior Chris Wessels homered twice and singled once, driving in three runs and scoring three.
Nate Lobdell (double), Kyle Fleischer (double, walk) and Max Wicklein added two hits each.