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That plug is worn out. The sharp edges on the center and ground electrodes are gone. Just look at the difference compared to a new plug below. The sharp edges concentrate the electric field and reduce the voltage needed to jump the gap (kinda like a lightening rod). Those worn away rounded edges require higher voltages to initiate the spark which puts additional strain on coil's electrical insulation. If all of your plugs look like that in only 10,000 miles, I would replace them with a different spark plug designed for higher boost / HP applications, i.e. NGK 95770 gapped to 0.022". I would also replace all of the ignition coils.
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