Brain › General KnowledgeThe first professional sports organization in the USA was formed in this city.BostonBaltimoreCharlestonClevelandAnswerThe correct answer is B) Baltimore.More General Knowledge questionsWhat does sagination mean?Who won the first chess tournament in the USA?Who is considered the Father of Modern Dentistry?What is Darlene Iskra famous for?Andreas Gruenintzig was the doctor who first performed this procedure.Finish the nursery rhyme: Peter Piper picked a peck of .........Play Brain · Practice