Never knew the ranger's name

Decades ago, on my first of many trips to Yellowstone, we pulled into Mammoth in mid-September. There was a herd of elk in one of the town's grassy areas. A man of, guessing, mid-fifties, who was dressed like a tourist cartoon character, had approached a bull with his small yapping dog to take pictures from a close distance. Due to his size and shape, it is safe to say the tourist was not fleet of foot. A gentle park ranger got the man's attention. He instructed the man to retreat, get back into his car,, and explained the elk was " ... not friendly like your dog".
First Name: 
Tom
Last Name: 
Hayward
Zip Code: 
98110
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Park: 
Yellowstone National Park
State: 
Washington