What types of pitbull are there?

there are tons of different bloodlines- is this a full grown dog? if so I really have no clue- but it does have the same head shape as my first APBT had as a puppy- he's of Boudreaux and Gator bloodlines- some other bloodlines include (but are NOT limited to) Red Devil, Gotti, Carver, Razor's Edge, Clic, Jeep, Pattons... all have different characteristics so yea- but your brindle could be any or none of these- from the pic it's impossible to tell....