▁to ▁become ▁acc lim ated ▁to ▁Boston ' s ▁sk ating ▁style ▁and ▁requirements ▁before ▁being ▁placed ▁on ▁a ▁home ▁team . ▁ ▁Teams ▁Boston ▁Rol ler ▁Derby ▁is ▁composed ▁of ▁four ▁home ▁teams , ▁the ▁Har bor ▁Hor ror s , ▁Cos mon aught ies , ▁N ut c rack ers , ▁and ▁W icked ▁P iss ah s ; ▁an ▁all - star ▁travel ▁team , ▁the ▁Boston ▁Mass acre ; ▁an ▁inter le ague ▁B - team , ▁the ▁Boston ▁B ▁Party ; ▁and ▁an ▁inter le ague ▁training ▁team , ▁the ▁Common . ▁ ▁In ▁addition , ▁Boston ▁offers ▁a ▁Training ▁and ▁Rec re ation ▁program ▁( TR T ), ▁for ▁new ▁and ▁transfer ring ▁sk aters ▁who ▁wish ▁to ▁learn ▁how ▁to ▁play ▁roll er ▁der by . ▁It ▁is ▁divided ▁up ▁into ▁two ▁levels — non - contact ▁and ▁contact — each ▁named ▁after ▁a ▁line ▁of ▁Boston ' s ▁MB TA ▁service . ▁Once ▁sk aters ▁gradu ate ▁from ▁the ▁TR T ▁program , ▁they ' re ▁el ig ible ▁to ▁be ▁draft ed ▁to ▁a ▁home ▁team ▁and ▁to ▁sk ate ▁with ▁the ▁Train ▁W re cks . ▁The ▁TR T ▁program ▁accepts ▁new ▁tra ine es ▁and ▁trans fers ▁on ▁a ▁three - month ▁cycle ; ▁the ▁application ▁period ▁is ▁approximately ▁one ▁month ▁before ▁the ▁cycle ▁begins . ▁ ▁Boston ▁also ▁provides ▁a ▁training ▁program ▁for ▁those ▁looking ▁to ▁become ▁roll er ▁der by ▁officials . ▁ ▁W FT DA ▁competition ▁ ▁Early ▁years