A golf or other ball initialing device including a molded ball holder, that incorporates an arcuate slot into which one or more initialing or numbering stencils may be applied, and when pressure fitted upon the ball, allows for the application of a marking pen to trace and imprint letters or numbers onto the surface of the ball, as desired. In addition, a stencil cap may be applied, of the same construction as that as previously defined, but held in position by means of a fastening strap, about the ball, as initialing is performed.