It marks the second straight season Hawthorne has made the playoffs after not making the playoffs for 10 years.
Delgado had five RBIs, Cynthia Quiroz had four hits, including two doubles, and two RBIs and Winnie Reece and Ivana Verdin had three hits and an RBI each for Hawthorne (10-6-1, 6-1), which is in second place in the Ocean League.
Culver City (9-11, 4-3) scored two in the top of the seventh to tie the score and one in the eighth to take a one-run lead before Delgado's walk-off blast.
"This is by far our biggest win of the season," Hawthorne coach Jerry Contreras said. "A walk-off home run over the fence to put us into CIF, the crowd went crazy, this is something we have not experienced here."

Fantastic finish by the Lady Cougars, from the volunteer hours put in to turn the ballfield areound to the exciting play in the field ! A great foundation for the program ! good job coach !