The San Gabriel Valley Tribune says 17-year-old Xavier Jones went down Nov. 24 at La Verne Lutheran High School.
Head coach Eric Cooper says the senior wasn't breathing and had no pulse. He and assistant coach John Osorno began CPR and got him breathing again.
Cooper says that by chance, he had reviewed how to perform CPR the night before with an iPhone app called Phone Aid.
The teen's family says he has hypertrophic cardiomyopathy, a thickening of the heart walls that could jeopardize his chances of getting a basketball scholarship next year.
Information from: San Gabriel Valley Tribune