The mid-1970s revival of modern Cardinals football was built on strong offensive line play, led by a legendary technician who became the benchmark for excellence. Dan Dierdorf, a consensus All-American at Michigan under Bo Schembechler, brought exceptional size and agility to the NFL when the St. Louis Cardinals took him in the second round of the 1971 draft. He then spent an impressive thirteen seasons with the team, combining physical prowess with technical mastery to become the top offensive tackle of his era.
His game showcased expert pass protection and run-blocking leverage, resembling a masterclass. Standing 6’3" and weighing 275 pounds, Dierdorf had a strong foundation, a powerful initial punch, and excellent lateral mirroring. Although he demonstrated versatility at guard and left tackle early on, his true breakthrough came in 1974 during his fourth season. After permanently moving to right tackle, Dierdorf became nearly unstoppable, earning his first Pro Bowl and second-team All-Pro honors while contributing to Don Coryell’s dynamic "Air Coryell" offense.
That breakout campaign sparked a five-year period of unparalleled individual dominance. Between 1974 and 1978, Dierdorf was recognized as the top tackle in the league, earning five straight Pro Bowl selections and four consecutive first-team All-Pro honors. He led a legendary St. Louis offensive line—alongside Conrad Dobler and Tom Banks—that consistently shut down the most formidable pass rushes of that era. His peak performance came in the 1975 season, when the Cardinals’ offensive line set an NFL record by allowing just eight sacks in 14 regular-season games.
Over the next two years, Dierdorf's dominance became nearly legendary. During the 1976 and 1977 seasons, he completely neutralized opposing pass rushers, going two years without allowing a single sack. His perfect mirroring technique was clearly shown in internal coaching footage, which displayed a player consistently winning crucial battles against top-tier edge rushers without needing help from tight ends. Due to his exceptional performance, the NFL Players Association named Dierdorf the NFL Offensive Lineman of the Year for three straight years (1976–1978). Dierdorf's legendary streak of allowing no sacks over the 1976 and 1977 seasons remains the gold standard for pass-blocking efficiency in franchise history.
Even when a severe knee injury sidelined him for most of the 1979 season, the veteran anchor displayed immense resilience. He authored a brilliant individual bounce-back during the 1980 campaign, returning to full strength to start all 16 games at right tackle, earning his sixth career Pro Bowl invitation and his fifth first-team All-Pro nod. Ever the consummate professional, Dierdorf willingly shifted to the center position for his final two years in 1982 and 1983, stabilizing an evolving interior front with his high-level diagnostic intelligence. The historic marathon in St. Louis reached its final punctuation following the 1983 campaign, when the veteran leader hung up his cleats after 160 regular-season games.
Dierdorf was named to the prestigious NFL 1970s All-Decade Team, and his journey came full circle in 1996 when the Canton, Ohio native was fittingly enshrined into the Pro Football Hall of Fame right in his own hometown. The Cardinals also honored Dierdorf in 2006 as a member of the inaugural group in their Ring of Honor.
