Task Force on Community Preventive Services

A marker for use with football sideline chains comprising a base plate having numerical yard line indicia printed thereon, the base plate having a viewing plate arranged in superimposed disposition over the base plate with a yard line indicia viewing bore formed in the viewing plate to conceal all but a pre-selected yard line indicia from view. A clip means is secured to the viewing plate for attachment of the marker means to the football sideline chain.