A one-piece knotless suture anchor with a breakaway distal tip is disclosed. The suture anchor includes a thin section connecting a distal anchor portion and proximal anchor portion. The thin section has a cutaway geometry allowing it to break in a repeatable manner. Force from a driver breaks the thin section connecting the distal and proximal anchor portions. The proximal anchor portion slides distally over the elongated member (either distal or proximal to the distal eyelet) and a repair suture is pinched between the distal and proximal anchor portions, or in between the bone tunnel walls and outer diameter of the sleeve, thereby fixing the repair suture in place without tying an arthroscopic knot.