Doctors described her recovery as a 'minor miracle'. [=her health was very bad and doctors were not sure if she would recover]
He spent many years in the 'minor leagues' before being called up to the major leagues.
The police decided he was a 'minor leaguer' in the drug trafficking world.
(..) - Congratulations son, this it is a great step. Thank you dad. - It is not supposed that you manage in Georgia. - Because? I have my permission. It is illegal that minors manage in a state that is not his. He/she didn't know it, I obtained that permission legally, it should not have any problem. (..)2007 Into the Wild