What a weekend for California chrome. One win away from the winner of the triple crown after his win in the preakness. He started using a nasal strip to breathe better but may not be able to use them... See More
What a weekend for California chrome. One win away from the winner of the triple crown after his win in the preakness. He started using a nasal strip to breathe better but may not be able to use them in the Belmont stakes which means he may not be able to run. Paula Faris has the story. Reporter: They're calling California chrome America's horse for a good reason. Ultimate underdog story. Two everyday guys with a dollar and a dream buy a horse for next to nothing and now they are on the doorstep of history. California chrome reaching for the wire. Reporter: With its win at the preakness over the weekend, California chrome is one gallop closer to horse racing's most elusive and exclusive club, the triple crown. Something that has not been achieved since affirmed swept the Kentucky derby, preakness and Belmont in 1978. For California chrome, it's the ultimate underdog tale. This little horse is bringing people together to say, you know what, the little guy can do it. Reporter: The 3-year-old colt comes from a humble pedigree and his co-owners, are not your average millionaire horse breeders. They're two middle class guys who decided to buy California chrome's mother for just 8,000 bucks on a whim. It was a choice one groomer called pretty dumb. But Coburn and martin took it in stride even naming their operation "Dap racing" short for dumb ass partners. This is a feel-good story. Everyday men that come from nothing out of nowhere with their first horse, the first time they tried to breed a horse. Reporter: So what's behind the colt's unlike lie success? Some credit his signature nasal strips which he started wearing to maximize oxygen flow such as his winning streak began but his owners aren't breathing easy this morning aftering learning the strips may have to go before the Belmont. It is not necessarily illegal in New York. You just have to ask permission. Reporter: Nasal strips or not these long shots find themselves at the edge of history with a major colt following. Never give up on your dream because they do come true and I'm living proof of it. And as for those nasal strips no one in horse racing truly believes that it gives California chrome an unfair advantage. It's just much more about comfort and, George, as we know in sport, superstition. On a hot streak. It's not against the rules or anything. You just got to ask permission. Hopefully they will. It's such a feel-good story. Would love to see that.
This transcript has been automatically generated and may not be 100% accurate.