Two Slammers FC girls teams -- the U-18s and U-16s -- return to the regionals Other girls teams who are defending champions are the Mustang Fury (U-13), So Cal Blues (U-14) and Colorado Nike Rush (U-19).
The three boys teams back at the regionals are West Coast FC (U-13), Arsenal FC (U-1) and Cisco Toros (U-19).
Play begins with round-robin games Monday through Wednesday. Play concludes with the finals on June 21.
For the latest on the Region IV Championships, click here.