This Is How Chief Keef Influenced Mumble Rappers

It's really hard to pinpoint who fathers all the mumble rappers. There's artists like Young Thug, who I wholeheartedly believe started the movement, but Genius News says that Chief Keef is that voice.

Between starting the Drill Rap movement and throwing in a massive amount of ad libs in his music, this video may prove that Chief Keef is that guy. Check it below!