The ornamental design for the race shirt, as shown and described.
FIG. 1 is a front perspective view of a race shirt showing my new design as worn;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof, the undisclosed right side view being a mirror image thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a front perspective view thereof, shown as worn with wires from a portable device extending from the shirt's front channels; and,
FIG. 7 is a front perspective view thereof, shown as worn with wires from a portable device extending from the shirt's sleeve channels.
Throughout the views, the broken lines showing portions of the human form, shorts, a portable device and wires illustrate the race shirt in use and form no part of the claimed design. The remaining broken lines on the surface of the shirt represent stitching.