FIG. 1 is a front and right side perspective view of a bat holder showing my new design, the broken-line disclosure of a portion of a fence and bat being for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is a rear view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a right side view thereof.