TRICK QUESTION! they are ALL mastiffs. well, at least according to the pit nutters at DRAW, dog rescue around washington. DRAW has decided that dog number three is a mastiff because she weighs 75 lbs. (or it could have something to do with the fact that no one wants to adopt pit dogs) but 75 lbs is not completely unheard of in the pit bull world. take grand champion mayday rom for example. his weight is listed as 75 lbs and fighting pit dogs are notoriously under weight.
potential dog adopters in washington and oregon beware.