Securing a genuine defensive cornerstone in the 18th round of the NFL Draft is extremely rare, but in 1963, the St. Louis Cardinals achieved this by choosing Georgia Tech’s Larry Stallings as the 241st pick overall. Despite never playing linebacker in college, Stallings was inserted into the starting lineup as a rookie and rapidly adapted, holding the left outside linebacker position for fourteen seasons straight (1963–1976).

Stallings applied a tough, blue-collar mentality to the second level of the Big Red defense. He excelled at setting the edge against the run, strongly resisting being pushed out by pulling guards, and had the agility to drop into boundary coverage. Despite facing early-career knee surgeries in 1964 and 1965, Stallings returned as a full-time starter in 1966 and demonstrated remarkable durability. From 1966 until the end of his career, he played all but two games over an eleven-year period.

His consistent performance earned him early recognition from his teammates, who named him the Cardinals Team MVP after the 1969 season. Stallings hit his career peak in 1970, achieving his best season with 4.0 sacks, two fumble recoveries, an interception, and earning First-Team All-NFC honors from UPI, along with his first Pro Bowl selection. From 1966 to 1976, Stallings was a mainstay at left linebacker, starting 149 of 151 regular-season games.

Stallings served as the defensive team's core through the mid-1970s, offering veteran leadership for the back-to-back NFC East division champions under Don Coryell in 1974 and 1975. When he retired after the 1976 season, he had played all 181 games with the Cardinals, starting 175 of them, and recording 9 interceptions, 13 fumble recoveries, 3 defensive touchdowns, and 27.5 unofficial sacks.

He retired following the 1976 season, finishing with 9 interceptions, 13 fumble recoveries, and 3 defensive touchdowns.

Sonny Randle was selected in the 19th round (218th overall) of the 1958 NFL Draft as a "futures" pick from Virginia. During his final college year, he focused on improving his track speed before joining the Chicago team in 1959. As a rookie, his playing time was limited, but he dedicated the offseason to refining his route running, practicing against teammates Dick "Night Train" Lane and Jimmy Hill. This effort helped convert his raw vertical speed into a highly developed skill. When the franchise relocated to St. Louis in 1960, Randle became a key player, leading the Big Red's passing attack and gaining national recognition.

Randle had explosive long strides that often outpaced coverage. His precise head fakes and quick breaks made him nearly unstoppable on double moves. In the red zone, his tracking ability and body position made him a top goal-line threat of his time.

His breakout season in 1960 showcased exceptional scoring efficiency. Randle led the NFL with 15 receiving touchdowns, setting a franchise record for a single season, and also recorded 62 receptions for 893 yards. His outstanding performance earned him First-Team All-Pro honors and initiated a three-year streak of Pro Bowl appearances from 1960 to 1962.

In the 1962 season, he achieved a career-high in yardage, with 63 receptions for 1,158 yards and 7 touchdowns, earning Second-Team All-Pro honors. The season’s highlight was a remarkable game at Yankee Stadium on November 4, 1962, when Randle set franchise records with 16 catches and 256 receiving yards against the New York Giants, records that remain unbroken.

Randle proved equally lethal in 1963, catching 51 passes for 1,014 yards and 12 touchdowns. After a shoulder injury shortened his 1964 campaign, he returned to peak form in 1965 with 845 receiving yards and 9 touchdowns, earning his fourth career Pro Bowl invitation.

Randle's 15 touchdown catches in 1960 remain the single-season Cardinals benchmark, and his 16 receptions for 256 yards against the Giants in 1962 stand as the team's untouched single-game records.  Randle departed for San Francisco in 1967, leaving St. Louis with an extraordinary legacy. Across eight seasons in a Cardinals uniform, he accumulated 328 receptions, 5,438 receiving yards, and 60 touchdown catches.

Drafted in the eighth round of the 1955 NFL Draft by the Baltimore Colts from Oklahoma A&M, Dale Meinert originally took a different route to professional football. He moved north to Canada, playing three seasons with the Edmonton Eskimos under coach Pop Ivy and earning two Grey Cups as an offensive lineman. When Ivy became head coach of the Chicago Cardinals in 1958, Meinert followed him to the United States, beginning as a guard for his first two NFL seasons before a positional change significantly altered his career.

Meinert was initially seen as undersized for interior offensive line positions. Switching permanently to middle linebacker in 1960 turned out to be an excellent decision. With sharp instincts, quick lateral pursuit, and a tough, downhill tackling approach, he soon became the strategic leader of the defense. Meinert assumed pre-snap play-calling responsibilities, often using a laid-back Oklahoma voice and sometimes tapping his defensive tackles on the buttocks to shift the defensive front into the correct position.

Following the franchise's move to St. Louis in 1960, Meinert's defensive impact was immediate. He picked off a pass in his very first start at linebacker and earned St. Louis Cardinals Team MVP honors in 1961. Over the next several seasons, he anchored the middle of the field against the run while dropping efficiently into pass coverage, picking up three Pro Bowl selections (1963, 1965, 1967). His pinnacle individual campaign arrived in 1967, when his leadership and field vision earned him Second-Team All-Pro honors alongside his third Pro Bowl invitation. Teammates frequently compared Meinert's impact directly to Hall of Fame contemporaries like Ray Nitschke and Dick Butkus, noting that his play-calling speed and range made him the heartbeat of the Big Red defense.

After capping off his career with that 1967 All-Pro campaign, Meinert decided it was time to step away from the game ahead of the 1968 training camp. It wasn't a spur-of-the-moment choice; after a decade of grinding collisions in the NFL trenches, he felt it was the right time to hang up his cleats and return to his home state of Oklahoma. He transitioned seamlessly into life after football, farming, teaching junior high math, and coaching eight-man high school football at Lone Wolf High School for 15 years.

Over his ten-year NFL career (all as a Cardinal), Meinert recorded 9 interceptions, 13 fumble recoveries, 12 unofficial sacks, and a defensive touchdown in 125 games.

In an era where fullbacks were viewed strictly as lead-blocking battering rams, a fifth-round pick out of Stephen F. Austin fundamentally changed how NFL offenses weaponized the backfield. Selected 115th overall in the 1990 NFL Draft, Larry Centers spent his first two seasons operating in near obscurity. Once the coaching staff recognized his elite hands and open-field route running, Centers transformed into a pass-catching machine who completely revolutionized his position.

Centers lacked the traditional, bone-crushing girth of classic 1990s fullbacks, but he possessed the movement skills and soft hands of a slot receiver. Operating out of the backfield as a primary check-down option, he excelled at finding soft spots in zone coverage, executing quick flat routes, and turning short dump-offs into first downs. His uncanny durability made him a security blanket for every quarterback who suited up for the franchise during his tenure.

After expanding his role with 50 catches in 1992 and 66 in 1993, Centers began posting receiving numbers that rivaled elite wideouts. With Buddy Ryan's arrival in 1994, his usage exploded. His historic peak arrived during the 1995 season, when he hauled in an unbelievable 101 receptions for 962 yards, becoming the first running back or fullback in NFL history to break the 100-catch threshold in a single campaign while earning his first Pro Bowl selection.

Centers followed up that landmark performance with another masterclass during the 1996 campaign, catching 99 passes for 766 yards and a career-high 7 receiving touchdowns while adding 425 yards on the ground to earn First-Team All-Pro honors and his second Pro Bowl invitation. He remained an essential offensive pillar for two more seasons, helping Arizona capture a famous playoff victory in 1998, before salary cap constraints led to his release prior to the 1999 season.

Centers continued his career with successful stops in Washington, Buffalo, and New England—winning Super Bowl XXXVIII with the Patriots in 2003 and retired with 827 career receptions, the most ever by a back at the time of his retirement. In nine seasons with the Cardinals, he accumulated 535 receptions, 4,617 receiving yards, 1,739 rushing yards, and 29 total touchdowns.