Embodiments of the present disclosure are related to a minimally invasive bone graft harvesting system, apparatus, and method. Certain embodiments of include a sheath, a trocar, a trephine, and a plunger. A sheath and trocar can be locked together to function like a singular device, and is used to penetrate bone. A trephine is slideably placed through a sheath to bore through bone. A trephine further has interior surface features to help retain bone, and a longitudinal slit to facilitate ejecting bone. A plunger is placed through the trephine to eject bone.