The Texans are going for their third consecutive national championship. The Bays also have two national titles under their belts from 2003 and 2004.
Stephen McCarthy (Santa Clara) and Omar Gonzalez (Maryland) both rejoined the Texans in the last 24 hours from the Pan-American games in Brazil.
Arsenal FC began its quest for its fourth national title in as many years with a 2-1 win over Atlanta Fire United in the U-18 boys division on Wednesday in Frisco, Texas.
A minute after United tied the game on a goal by Jonathan Hull, Gerson Mayen scored to give Arsenal the victory.
Real So Cal U-16 boys began their bid for a third straight national championship with a 1-0 win over the FC Delco Hammerheads on a goal by Ernest Balba.
Real So Cal had two penalty kicks that could have given them the lead early in the second half, but both were missed high and wide.
Dallas Texans Red (TX-N) 2, Baltimore Casa Mia Bays (MD) 0
Goal Scorers: Sajjadi 9, Dworsky 26
Chicago Magic (IL) 2, South San Jose/San Juan Ruckus (CA-N) 1
Goal Scorers: Waspi 50 57; Cosgriff 61.
Arsenal FC (CA-S) 2 Atlanta Fire United (GA) 1
Goal Scorers: Peterman 45, Mayen 79; Hull 78
Terryville Fire (E-NY) 0, NFC Bluejays (NE) 0
Andromeda (TX-N) 1 FC Milwaukee (WI) 0
Goal Scorers: Guehler 78
FC Delco (E-PA) 2 Real Colorado National (CO) 1
Goal Scorers: Miller 3, Bowen 60; Starr 56.
Michigan Wolves (MI) 1, Houstonians (TX-S) 0
Goal Scorers: Catalano 75.
Real SoCal (CA-S) 1 FC Delco Hammerheads (E-PA) 0
Goal Scorers: Balba 79.
PDA Larsson (NJ) 2 Sereno White (AZ) 0
Goal Scorers: Eisenbud 10, Hernandez 59.
Michigan Wolves Black (MI) 2, Lonestar Red (TX-S) 1
Goal Scorers: Barens 9, Keener 46; Robertson 78.
CASL Elite (NC) 0, Sockers FC Chicago (IL) 0
Baltimore Casa Mia Bays (MD) 1, West Coast FC (CA-N) 1
Goal Scorers: Kansaye 50; Guitierrez 68.