Tim Tebow is expected to testify against his trainer, who is accused of injecting athletes with performance-enhancing drugs, according to a new report.

The Heisman Trophy winner appears on a list of expected witnesses filed by one of the plaintiffs who is suing the trainer, Ian Danney, USA Today reported.

Danney — whom the former quarterback once praised for helping him through a muscle injury in 2016 — is accused in two separate suits of injecting his clients with banned substances that resulted in their suspensions.

Both plaintiffs — Oakland Raiders defensive lineman Corey Liuget and former Olympic bobsledder Gea Johnson — want Tebow to take the witness stand.

But so far he’s only expected to testify in Johnson’s case “regarding the Defendants’ illegal activities, to include, but not be limited to: procuring prescription medications and illegal substances to distribute to PEP clients — including those distributed by Danney to Mr. Tebow,” according to a filing obtained by USA Today.

Johnson’s expected witness list also includes former NFL player James Harris and Patrick Arnold, the BALCO chemist who was at the center of the sports doping scandal in the 2000s.

The civil case will go to trial in Arizona next year.

Johnson tested positive for Nuvigil, a banned stimulant, in August 2016 and told the US Anti-Doping Agency that she was provided the substance from Danney. She was issued a 21-month suspension.

Liuget, meanwhile, has accused Danney in his California suit of injecting him with a banned growth-hormone peptide without his consent — leading to his suspension from the NFL last year.

Tebow’s reps didn’t return messages from USA Today.

Danney has denied the allegations and maintained that he never gave Tebow “any illegal substance.”

“Mr. Danney is pursuing all legal remedies to obtain dismissal of the remaining claims of the lawsuit that the Court has yet to dismiss,” his lawyer, Louis Lopez, said in an email to USA Today.