According to MiLB.com, Nick Parent, White Sox farmhand and son of White Sox bench coach Mark Parent, has been suspended for using Stanozolol, a banned performance-enhancing substance. He received a 50-game suspension by the Office of the Commissioner of Baseball for this violation of the Minor League Drug Prevention and Treatment Program
Stanozolol is a synthetic anabolic steroid derived from testosterone. It is ordinarily used for treatment of weak/sick animals such as horses but it's also been linked to 12 minor leaguers in 2013, who presumably did not ingest it while treating/eating their farm animals.
Parent, drafted in the 36th-round in this year's amateur draft out of Cal State Monterey Bay as a first baseman, has spent time mostly at first base and DH for the Rookie-level Bristol Sox - though he has played catcher in 3 games and that is where he was expected to be in the future. In 82 plate appearances, he has a line of .114/.244/.114.
A total of 47 minor leaguers have been suspended so far in 2013 for drug violations.