(AP Photo/Timothy J. Gonzalez)
Arizona's Allonzo Trier has been declared ineligible for the reappearance of a banned substance that led to a 19-game suspension last season.
The NCAA notified the school on Thursday that the preseason All-America junior guard tested positive for trace amount of the substance late last month.
Arizona says the amount detected was minuscule by scientific standards and appeared to be a remnant of the undisclosed performance-enhancing drug Trier said he unknowingly ingested last season. The NCAA agreed, the school said.