CNN CNN Newsroom September 27, 2013 13:27:00
>> reporter: an arbitrator will hear both sides. rodriguez claims major league baseball used unethical practices to target him because he was overpaid and underperformed, and major league baseball's claim, rodriguez took p.e.d.s, performance enhancing drugs, including testosterone in human growth hormone. mlb's case centers on this man, anthony bosch founder of biogenesis. is bosch prepared to testify monday he gave rodriguez p.e.d.s, if so, it would be a different account of what he told espn last april. >> i'm a nutritionist. i don't know anything about performance-enhancing drugs. >> report...