I claim the ornamental design for a baseball window shade or covering, as shown and described.
FIG. 1 is a front view of a baseball window shade or covering according to the present invention in an open position.
FIG. 2 is a perspective view of a baseball window shade or covering according to the present invention in an open position.
FIG. 3 is a side view of the baseball window shade or covering of FIG. 2; and,
FIG. 4 is a top view of the baseball window shade or covering of FIG. 2.
The broken lines showing of a back portion of the shade are for illustrative purposes only and form no part of the claimed design. The broken lines on the on the front of the portion of the baseball window shade or covering are for illustrative purposes only and form no part of the claimed design.