The 1970 Oakland Raiders season was the team’s 11th season. In their first season in the AFC West following the merger between the AFL and the NFL, the Raiders won the division championship. They advanced to the AFC Championship Game where they lost to the Baltimore Colts.
In 1970, Blanda was released during the preseason, but bounced back to establish his 21st professional season as one of the more dramatic comebacks in sports history. Beginning with the October 25 game at Pittsburgh, Blanda put together five straight clutch performances.
Against the Steelers, Blanda threw for two touchdowns in relief of an injured Daryle Lamonica. One week later, his 48-yard field goal with three seconds remaining salvaged a 17–17 tie with the Kansas City Chiefs. Repeating the thrilling finish on November 8, Blanda once again came off the bench to throw for a pass to tie the Cleveland Browns with 1:34 remaining, then kicked a 53-yard field goal as time expired for the 23–20 win. In the team's next game, Blanda replaced Lamonica in the fourth quarter and connected with Fred Biletnikoff on a touchdown pass with 2:28 left in the game to defeat the Denver Broncos, 24–19. The incredible streak concluded one week later when Blanda's 16-yard field goal in the closing seconds defeated the San Diego Chargers, 20–17.
In the AFC title game against the Baltimore Colts, Blanda again relieved an injured Lamonica and had a superb performance, completing 17 of 32 passes for 217 yards and 2 touchdowns while also kicking a 48-yard field goal and two extra points, keeping the Raiders in the game until the final quarter, when he was intercepted twice. Aged 43, he became the oldest quarterback ever to play in a championship game
Blanda's eye-opening achievements resulted in his winning the Bert Bell Award. Chiefs' owner Lamar Hunt quipped, "Why, this George Blanda is as good as his father, who used to play for Houston." Although he never again played a major role at quarterback, Blanda would serve as the Raiders' kicker for five more seasons.