The ornamental design for scrub pants, as shown and described.
FIG. 1 is a front view of scrub pants showing the claimed design;
FIG. 2 is a rear view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a right side view thereof; and,
FIG. 5 is a front perspective view thereof.
The dot-dash broken lines in the figures and the areas within the dot-dash broken lines show portions of the scrub pants that form no part of the claimed design.
The dashed broken lines show a stitching pattern. The dashed broken lines form no part of the claimed design.