AUSTIN, Texas -- Former University of Texas quarterback James Street has died, the school confirmed Monday.

As the operator of Darrell K. Royal's famed Wishbone offense, Street led the Longhorns to a national championship in 1969. The cause of his death was not immediately known. Street was 65.

Former President Lyndon B. Johnson congratulates Texas quarterback James Street and coach Darrell Royal after the Longhorns defeated Notre Dame in the Cotton Bowl on Jan. 1, 1970. AP Photo

"Very sad day as we lost college FB great, good friend & wonderful man with passing of James Street," Longhorns coach Mack Brown announced on his Twitter account. "Our thoughts & prayers are with Janie & family."

Street made his first career start two games into his junior season in 1968 and went 20-0, with a Cotton Bowl Classic victory over Notre Dame in 1969 and a win over Arkansas in the matchup billed as the "Game of the Century."

Street clinched victory for the top-ranked Longhorns in "The Big Shootout" with a 52-yard touchdown run and then one of the great plays in school history, "Right 53 Veer pass." On fourth-and-3 late in the fourth quarter, Street connected with a double-covered Randy Peschel for a 44-yard pass. Texas would score two plays later and win 15-14.