The Percussion Ensemble consists of the marching percussion (also called drumline or battery) and front ensemble (also called pit) sections of the Spartan Regiment. Members consist of students from Damien High School, Pomona Catholic High School, and St. Lucy's Priory High School. Tryouts are usually held in December. Indoor percussion shows are based on a theme, similar to the field season, and are choreographed to tell a story. All members will receive a custom uniform that supports the show's theme. The percussion ensemble competes in the SCPA (Southern California Percussion Alliance) circuit. Competitions are held on Saturdays and Sundays in late February and early March. Championships are held in early April and only the top 12 drumlines qualify for championships. Prelims are usually the last Saturday in March. There are usually 20-25 members and transportation to shows is coordinated by parent carpools. There are no competitions that require overnight travel.
|February 16||SCPA Monrovia||12th place 63.1|
|February 29||SCPA Rancho Cucamonga||8th place 63.1|
|March 7||ADLA Ramona||5th place 71.5|
|March 15||SCPA Great Oak||Canceled|
|March 28||SCPA Prelims||Canceled|
|April 5||ADLA Semifinals||Canceled|
|April 18||ADLA Championships||Canceled|