The mother of Yankees pitcher Joba Chamberlain pleaded no contest Monday in Lancaster County District Court to a felony charge of delivery of a controlled substance.

Judge Karen Flowers accepted the plea from Jackie Standley on the Class II charge that carries a penalty of as many as 20 years in prison. It was amended from a Class II felony punishable by as many as 50 years in prison.

The judge set Standley's sentencing for Dec. 16, pending a treatment recommendation from CenterPointe, a dual-diagnosis drug and alcohol treatment center.

Dual-diagnosis usually refers to people suffering from mental health and substance abuse issues.

Lincoln police arrested Standley, 44, in May for selling methamphetamine to an uncover investigator in February at her apartment in south Lincoln.

In July, she pleaded not guilty to that charge.