Bob told ET that he was watching the game between Ohio State and Oregon, but didn't notice anything out of the ordinary.
"I noticed he was very handsome, but I never made a connection between he and myself," Bob joked. "My daughter called because she takes care of the Twitter and the Facebook and all that stuff. She said, 'Dad, turn on the game.' and I said, 'Well, I got it on.' 'People are calling in. They're going crazy on the Internet that the guy looks like you.'"
Shortly afterward Bob tweeted out a message to his more than 88,000 followers, "In regards to my new career as head ref for #OSUvsORE -- Hey, I don't have a series anymore -- I had to do something."
The jokes kept coming during our interview, as Bob kidded that his wife Ginnie saw the incident as an opportunity.
"I woke up this morning and my wife had rode off with him," Bob joked. "It's good and bad you know? After 52 years, she's up and bam! Gone."
Bob and Ginnie wed in 1963 and have four children together (Robert, Timothy, Jennifer and Courtney). After a whirlwind 24 hours, we wondered if Bob would ever meet his doppelganger in person.
"It depends on how tall he is," Bob said. "I don't want to look like [Willow actor] Billy Barty next to him, but I'd love to meet him."
And could we ever see Bob on the football field?
"Maybe tossing the coin," Bob said. "You never know."