The ornamental design for a sportballholder, as shown and described.
FIG. 1 is a top perspective view of a first embodiment of a sport ball holder;
FIG. 2 is a top view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a cross-sectional view thereof taken in the direction of line 5-5 in FIG. 2;
FIG. 6 is a top perspective view of the sport ball holder of FIG. 1 shown in a position of use with an unclaimed ball drawn in broken lines placed into the sport ball holder;
FIG. 7 is a top perspective view of a second embodiment of a sport ball holder;
FIG. 8 is a top view thereof;
FIG. 9 is a top perspective view of a third embodiment of a sport ball holder; and,
FIG. 10 is a top view thereof.
The dot-dash-dot broken lines in the drawings depict the boundaries of the claim and form no part thereof. The dash-dash broken lines in FIG. 6 illustrating a ball depict environment and form no part of the claimed design. All other broken lines depict portions of the sport ball holder that form no part of the claimed design. The left side view, right side view, and rear view of the sport ball holder of FIG. 1 are omitted because they are identical to the front view shown in FIG. 4.