The ornamental design for a sportshirtsleeve, as shown and described.
FIG. 1 is a front elevational view of a sport shirt showing my new sleeve design, the dashed lines demonstrating a typical sport shirt body are included for the purpose of illustrating environment and form no part of the claimed design;
FIG. 2 is a front elevational view of the left sleeve as seen in FIG. 1 removed from the shirt, the rear elevational view being a mirror image thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a left side elevational view thereof; and,
FIG. 6 is a right side elevational view thereof, it being understood that the right sleeve as seen in FIG. 1 is a mirror image thereof and that FIGS. 2-6 are seen in an open posture.