Raiders star Ashton Jeanty backs Nukleus, a tech platform for athletes and their advisors

Las Vegas Raiders running back Ashton Jeanty, an investor in Nukleus and a spokesperson for the platform. (Nukleus Photo / Ben Miller) Hector Rivas spent a decade building ThriftBooks into one of the country’s largest used-book sellers, before an unlikely second act: co-founding a sports agency representing NFL players. That career change led him to the problem behind his newest startup, and to the Las Vegas Raiders running back who just invested in it.