I feel bad for Chris Davis, for example. He had a prescription and an exemption, it expired, and he got pinched for Ritalin or whatever it was. That's ridiculous. He wasn't exactly Daryl Strawberry.
Chris Davis may have a legitimate need for ADHD medication. Who knows. What I know is that (a) MLB has a problem with guys getting prescriptions for amphetamines for performance enhancement and (b) it's impossible to parse which guys have legitimate medical needs or not.
The facts about Chris Davis are the following:
1. Chris Davis got his first ADHD diagnosis and adderall prescription in 2008 as a 22-year old, the first year he entered the majors.
2. Chris Davis lost his Therapeutic Use Exemption because MLB decided he didn't really have a Therapeutic Use.
3. He took it again because, in his words, he couldn't see the ball as well.
The 3rd part is hard - all players benefit from taking adderall, the same way all college students do. Of course taking adderall makes it easier for Chris Davis to concentrate at the plate, that's the whole point of the drug.
As many have pointed out, there are a million signs that this is a problem in MLB, the most glaring of which is that baseball players don't really seem interested in the non-amphetamine forms of ADHD medication. Wonder why...