Rodrigo Lopez scored in the 65th minute, lifting Republic FC over Los Angeles Galaxy II 1-0 on Sunday in Carson.
Republic FC (6-4-0) improved to 3-0 against Galaxy II (4-4-1) this season.
Los Angeles almost scored in the 45th minute as midfielder Ariel Lassiter hit the left post and the defense cleared the ball.
It was the second consecutive shutout for Republic FC, which has not allowed a goal in 202 consecutive minutes.
Lopez leads the USL with seven goals, and Republic goalkeeper Patrick McLain tops the league with four shutouts.