C.J. Harris was slated to play this season as a preferred walk-on defensive back for Auburn. Harris has a history of seizures due to epilepsy, he says, and treats them with prescribed cannabis oil. Now he’s not slated to play for Auburn anymore.

WGXA reports that Harris started taking the cannabis oil in January 2017, after he had a fourth seizure. Harris received his epilepsy diagnosis when he was a high school sophomore and apparently struggled with them until he started using the oil. Then, they stopped.

Harris’ family says he can’t play at Auburn because of NCAA rules. Another report says it’s because of his epilepsy, not because of how he treats it.

247Sports reports that Auburn rescinded the offer of a roster spot to Harris because its medical staff “was concerned about the epilepsy and wanted to protect his well being in a full-contact sport that could lead to head trauma.”

But as long as Harris uses the cannabis oil, the logistics of how he lost his spot on Auburn’s roster might be immaterial.

Marijuana is a banned substance under NCAA rules, and players are subject to NCAA drug tests. If a player tests positive for the cannabinoid THC, he loses half his remaining eligibility, according to an NCAA presentation to players. Some snippets from that presentation offer insight into how the NCAA frames discussions about weed: