We claim the ornamental design for a target retriever system, substantially as shown and described.
FIG. 1 is a perspective view of a target retriever system showing the new design;
FIG. 2 is a front end view of target retriever system of FIG. 1 showing the new design;
FIG. 3 is a rear end view of the target retriever system of FIG. 1 showing the new design;
FIG. 4 is a left side view of the target retriever system of FIG. 1 showing the new design;
FIG. 5 is a right side view of the target retriever system of FIG. 1 showing the new design;
FIG. 6 is a top view of the target retriever system of FIG. 1 showing the new design; and,
FIG. 7 is a bottom view of the target retriever system of FIG. 1 showing the new design.
The broken lines showing one or more cameras mounted onto the target retriever system, screws, bolts, connections, internal components and recesses for connection on the target retriever system, are for illustrative purposes only and form no part of the claimed design.