Sorry to bother y'all, but I've searched the internet with no results. While watching Sunday's game between New Orleans and Tampa Bay, I noticed an official in the end zone throw down a blue marker, smaller than the yellow flag, when a safety had been scored. Never saw the thing before, but since then, I've seen the blue markers, or whatever they are, hanging on the officials' belts. I've done searches and checked a football book here at home, and haven't even come close.
What IS that thing, and when is it used?
Thanks for your help.
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