The ornamental design for an endcap for a lacrosse shaft, as shown and described.
FIG. 1 is a perspective view of an end cap for a lacrosse shaft when viewed from the open end of the end cap, wherein the end cap includes a round closed end, a hollow elongated portion having an open end for receiving a lacrosse shaft, and a ring around the hollow elongated portion for grips and control of a lacrosse shaft by a player's hand.
FIG. 2 is a side view of the end cap of FIG. 1; and,
FIG. 3 is a perspective view of the end cap of FIG. 1 when viewed from the closed end of the end cap.