Ucha'an K'in B'alam (Ruler 3, "Master of Sun Jaguar") (727–741) seems not to have been a direct heir to the throne but rather a regent providing strong leadership while the heir was still a child. Twenty years before his rise to the throne he was already a prominent figure in Dos Pilas, responsible for the capture of the lord of Tikal in AD 705 and being closely involved in rituals performed by the previous king. Ucha'an K'in B'alam took a wife from Cancuén, a city that controlled the upper reaches of the Pasión River. "Master of Sun Jaguar" died in May 741, his death is recorded on Stela 1 at his twin capital of Aguateca where it is believed that he was buried, although his tomb has not yet been found.