Dee ihe na-esote paragraf a - A na-egwu ụfọdụ agba nke playoff (dịka MLB's ugbu a Division Series) na usoro kachasị mma ise, nke mere na egwuregwu 5 nwere àgwà ndị yiri nke ndị a kọwara n'elu, ọ bụ ezie na ihe mgbagwoju anya na ihe nkiri nwere obere oge iji wuo na usoro dị mkpirikpi. Ọzọkwa, World Series nke 1903
, 1919, 1920, na 1921 na-egwuri egwu n'ụdị kachasị mma nke itoolu, ọ bụ ezie na ọ dịghị nke anọ gara egwuregwu dị mkpa 9.