Born in Brownwood, Texas to Mexican parents, in 2001, Isaís' family relocated to the Mexican town of San Francisco del Rincon in the state of Guanajuato, near the city of León.
It was there that Isaís began to develop a love for the sport. Eventually earning a spot with Morelia's academy, he became a starter for their under-13 squad in 2014, but then he moved to the U.S. that same year. With relatives nearby and with better job prospects, his parents decided on North Carolina. Isais attended East Forsyth High School in Kernersville, North Carolina
Club career
Pachuca
In 2018, Isaís joined the Pachuca youth system. He made his professional debut for Pachuca on July 5, 2022, against Querétaro
Loan to Club León
In 2019, Isaís signed for Liga MX club León. He made his professional for Club León against his parent club Pachuca on January 26, 2020.
Toluca
On May 30, 2023, it was officially announced that Isaís would join Liga MX club Toluca
International career
Born in the United States, Isaís is eligible to represent the United States and Mexico at international level.
Mexico
In November 2022, Isaís was called up by Mexico manager Tata Martino for Mexico's World Cup preparation friendlies against Iraq and Sweden in Girona, Spain. Isais featured on the bench in Mexico's 4–0 against Iraq but did not make an appearance with the national team.