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6/3/2013 9:29 P.M. ET

Draft prospect Gray tests positive for Adderall

No. 38 prospect Blair also tests positive for banned substance

Reports that University of Oklahoma's Jonathan Gray, the potential No. 1 overall pick in Thursday's First-Year Player Draft, tested positive for the drug Adderall were confirmed to MLB.com by a Major League team source.

MLB.com also learned fellow college right-hander Aaron Blair, a junior from Marshall University, and No. 38 on MLB.com's Top 100 Draft Prospects list, tested positive for the same drug.

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Adderall is generally prescribed for those with Attention Deficit Hyperactivity Disorder (ADHD). It is a banned substance according to Major League Baseball and a player needs a prescription for it or face suspension for a positive test. While neither Gray nor Blair have a prescription for the drug, they cannot be suspended by Major League Baseball, but they will have to take follow-up tests as professionals. Major League Baseball tests all Top 200 Draft prospects prior to the Draft.

"I've heard different things over the years," said one scouting director. "I've heard kids take it for exam week. This is not the first time it's occurred."

It's become a growing trend on college campuses for students to take prescription medications like Adderall to get through final exams. Whether that's the case with Gray and Blair is unknown. Gray did not respond to messages, and Blair was not immediately available for comment.

The news didn't seem to disturb scouts reached by MLB.com, with the general consensus being that neither player's Draft status will be hurt. The general sentiment was that there would be more of a problem if a player had tested positive for a steroid or a drug of abuse.

"I don't think that will affect much of anything," the scouting director said. "There are a whole lot of guys in the big leagues who have a prescription for that."

Jonathan Mayo is a reporter for MLB.com and writes a blog, B3. Follow @JonathanMayoB3 on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.