The San Bernardino Sheriff's Department said Abiathor Mejico was arrested on Monday and booked into West Valley Detention Center.
Deputies said they learned last week that he forced a teenager to have sex with him.
During their investigation, they also said a second victim surfaced, who stated she had been drugged and assaulted by Mejico when she was a minor.
Authorities said Mejico had been a softball coach for years and is also an instructional aid for Pomona High School.
If you have any information regarding this case, you're urged to contact the Rancho Cucamonga Sheriff's Station.