The ornamental design for a baseballwalkingstick, as shown and described.
FIG. 1 is an isometric view of a baseball walking stick;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines depict surface indicia on the article form no part of the claimed design.
The wavy lines on the article in the drawings depict a symbolic break in the length of the claimed design and are not part of the claimed design. The appearance of any portion of the baseball walking stick between the break-away lines forms no part of the claimed design.