The ornamental design for the protective shoulder pad, as shown and described.
FIG. 1 is an isometric view of the protective shoulder pad of the present invention.
FIG. 2 is a front view of the protective shoulder pad of the present invention.
FIG. 3 is a rear view of the protective shoulder pad of the present invention.
FIG. 4 is a top view of the protective shoulder pad of the present invention.
FIG. 5 is a bottom view of the protective shoulder pad of the present invention.
FIG. 6 is an elevation view of the protective shoulder pad of the present invention; and,
FIG. 7 is an elevation view opposite to that which is shown in FIG. 6 of the protective shoulder pad of the present invention.
The broken lines showing a person wearing the protective shoulder pad of the present invention is included for the purpose of illustrating environment and forms no part of the claimed design.