What Breed Is My Dog?

Meet Rocky, he's 2 years old, his coat is mostly black, but the black is embedded in a brown/red fur. He's very energetic and very athletic, he loves to jump. He's also very "animal aggressive", not people aggressive, and territorial. He's not neutered so he has a lot of built-in testosterone, a very macho chest out and some cases dominant. He's fast, but tends to run a little awkwardly if you ask me. From these pictures can you please tell me what he is and belongs to? His teeth are very sharp and he's very strong lean and powerful.

Thank you