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Matt Gelb and Bob Brookover of the Philadelphia Inquirer report that Ruiz had tested positive for the stimulant Adderall, a prescription medication used to treat Attention Deficit/Hyperactivity Disorder (ADHD).
An initial positive amphetamine test triggered the enhanced testing process, the Inquirer reports:
Under MLB's program, Ruiz was subject to six unannounced follow-up tests over the 12 months after the initial violation, in addition to the standard random testing. A first positive test for a stimulant, unlike steroids, does not result in suspension. Instead, the increased testing is implemented. Ruiz would be suspended for 80 games should a third positive test emerge.
Ruiz, through the Major League Baseball Players' Association, issued a statement:
I am sincerely regretful for my mistake in taking a prohibited stimulant.
I apologize to my teammates, the Phillies organization, and the
Philadelphia fans. I will serve the imposed 25-game suspension to begin
the season and I look forward to returning to the field and working toward
bringing a championship back to Philadelphia in 2013.