Right-hander Michael Slayton worked six perfect innings as No. 11 Atholton beat visiting Hammond, 10-0, on Tuesday.
The Raiders improved to 3-0, and the Bears fell to 0-1.
Slayton (2-0) gave up no runs, no hits and no walks and had 10 strikeouts. He has not allowed a run in 11 innings. Slayton also hit a double.
Atholton's Brady Acker went 4-for-4 with two doubles, two singles, three runs scored, two RBIs and a stolen base, his 66th straight successul stolen base attempt.
No. 4 Reservoir 9, Marriotts Ridge 2: Right-hander Cody Morris (2-0) gave up one run on four hits, walked two and struck out 10 as the host Gators improved to 3-0 and the Mustangs fell to 3-1.
No. 2 Northeast 3, No. 7 Glen Burnie 2: Brooke Steinbach pitched seven innings and struck out 12 as the host Eagles (5-0) beat the Gophers.
Northeast trailed 2-1 heading into the sixth, when the Eagles drove in two runs to win.
No. 12 Spalding 5, No. 3 Mount de Sales 2: Winner Ali Caulkins gave up two runs on five hits and struck out four as the host Cavaliers (2-1) upset the Sailors (2-1).
Spalding took a 3-0 lead in the second inning.
No. 4 Chesapeake-AA 12, North County 2: Emily Mueller (3-1) worked six innings, gave up two runs on seven hits and struck out four as the host Cougars (3-1) beat the Knights (1-5).
No. 6 Seton Keough 10, Notre Dame Prep 0: Kelly Lynch (3-0) gave up three hits and struck out nine as the visiting Gators (3-0) shut out the Blazers.
Offensively, Lynch also hit a triple.
Havre de Grace 11, No. 15 C. Milton Wright 1: The visiting Warriors scored seven runs in the top of the fourth inning to upset the Mustangs (2-2).
Taylor Smith and Megan Thompson homered for Havre de Grace.
John Carroll 11, Gerstell Academy 9: Cody Saunders and Carson Walton each had three goals to lead the Patriots (3-2) past the host Eagles.
No. 13 Bryn Mawr 12, Mount de Sales 11: The visiting Mawrtians (3-3, 3-3 Interscholastic Athletic Association of Maryland A Conference) had a three-goal lead late in the game and held off the Sailors (0-5, 0-4).
Mandy Ignacio had four goals for Mount de Sales.