Ream and run is a method of shoulder replacement for younger and physically active patients who are at risk for eventual failure of the implant. The weak link in shoulder replacement is the glenoid or plastic socket. The ream and run avoids the use of a glenoid implant by shaping the native socket to a conformity with the ball. This provides optimal loading mechanics and smooth range of motion without the risk of glenoid implant loosening, wear or fracture.