He was a popular spokesperson for various products, and he has been consistently involved in charity work, starting in college, continuing throughout his NFL career, and remaining so today.

[8] Youngblood and his teammates were part of the testing for what became Gatorade, a beverage created by doctors Robert Cade and Dana Shires, designed to help Gator athletes who had to practice and play in Central Florida heat.

[11] Youngblood first gained national attention after an October 4, 1969, five-sack performance 21–6 win versus instate rival Florida State University.

[17] Some regard Youngblood, who was considered to be an excellent pass rusher,[18][19] as the best defensive lineman in Gators history as well as one of the top five players in the University of Florida's football program.

[20] When Time magazine chose him for their 1970 All-America Team, it said of Youngblood: "Deceptively fast for his size, he reads screens and swing passes so adroitly that he intimidates quarterbacks by his mere presence.

"[21] His coach Doug Dickey told The Sporting News, "He is difficult to move when you run at him, has the speed and agility to pursue down the line of scrimmage, and the strength and quickness to rush the passer."

For the third consecutive season Youngblood led the Rams in sacks (15) and was named to the Pro Bowl and a consensus All-pro again, repeating his 1974 honors.

[33] Later in the game, Youngblood forced a fumble that was recovered by teammate Fred Dryer, blocked an extra point attempt, and sacked Hart to stop a Cardinals drive.

His tan arms hanging out of his sleeveless jersey, he'd put those pipes on the ground, and even at 240 pounds, he would show great moves and natural strength for an undersized player.

Youngblood repeated his NFC Defensive Player of the Year Award in 1976 while co-leading the Rams in sacks with 14.5, being named to his fourth consecutive Pro Bowl, and being a consensus first-team All-Pro for the third straight season.

[37][38] The following year, 1977, Youngblood was voted to his fifth consecutive Pro Bowl and a consensus All-NFC selection and second-team All-Pro while leading the Rams in sacks for the fifth straight season.

In 1978, the Rams led the NFL in total defense and Youngblood was named to his sixth consecutive Pro Bowl and was a consensus first-team All-Pro for the fourth time in five years.

[59] He attributed his ability to play to a series of back adjustments that allowed him more freedom of movement, even though team doctors told Youngblood he was out for the season and needed surgery.

The book recounts when, between the 1973 and 1974 seasons, Youngblood traveled to Logan, Utah, to help Rams teammates Merlin and Phil Olsen with their summer football camp.

In 1998, Youngblood's final year with the team, the club won its first Arena League championship, defeating the favored Tampa Bay Storm.

[84] Additionally, some of the sponsorships and advertising ventures Youngblood was involved with were a Miller Lite TV commercial in 1985 and Honda Power machines in 1985.

[105] Five years later, in 2006, Youngblood was among the first four Gator legends to be inducted into the Florida Football Ring of Honor, alongside Steve Spurrier, Danny Wuerffel, and Emmitt Smith.

He was also selected to the FWAA 1969-1994 All-America Team with players like Lawrence Taylor, Jerry Rice, John Elway, Tony Dorsett, Ronnie Lott, and Jack Tatum.

Youngblood, in 1987, was voted to the Orange County (California) Sports Hall of Fame along with Pat McCormick, Ann Meyers and Cap Sheue.

He was elected to the Pro Football Hall of Fame in 2001 along with Ron Yary, Lynn Swann, Jackie Slater, Mike Munchak, Marv Levy, and Nick Buoniconti and inducted in August in Canton, Ohio.

[117] Youngblood echoed his post-retirement sentiments in his Hall of Fame acceptance speech by stating, "I didn't sack the quarterback every time I rushed the passer.

writer Charles Robinson as the best-ever player taken in the 20th slot of the 1st round of the NFL draft calling Youngblood "the essence of today's defensive end—a mixture of strength, toughness and speed that few ends boasted in the 1970s.

[124] Other NFL greats such as Hall of Fame tackles Bob Brown[125] and Rayfield Wright,[126] rank Jack among the top players they faced.

[119] Opposing quarterbacks ranked Youngblood highly, with two of them, Fran Tarkenton and Roger Staubach, stating that Jack was the top defensive lineman they faced in their careers.

[127] Running backs also entered the chorus, "I remember bouncing off Jack Youngblood and it was just like a pillar of strength over there on the defense," Rocky Bleier recalled.

"[130] While at the University of Florida, Youngblood was involved in the Fellowship of Christian Athletes while also speaking to youth groups and raising funds for needy children.

[133] Since 2001, Youngblood has been the St. Louis Rams' host for the Taste of the NFL charity event,[134] a dinner held annually at the Super Bowl to raise funds for Feeding America-The Nation's Foodbank Network.

[136] Throughout his NFL career and after Youngblood has been a skilled public speaker, sought after by corporate, athletic, and Christian groups due to his activity and success in those arenas.

Youngblood served on the Honorary Advisory Board of the former St. Louis Rams[139] notables like Bill Cosby, August A. Busch III, Jonathan Winters, Dick Gephardt, Jackie Joyner-Kersee, and Stan Musial, Maxine Waters, Dr. Toby Freedman, et al. Former members of the Rams Advisory Board, created in 1981, include Lord David Westbury, former Ram and Evangelist Rosey Grier, Maureen Reagan, Henry Mancini, Bob Hope, Danny Thomas, Jane Upton Bell, and former President Gerald Ford among others.

The Gridiron Greats sponsors golf tournaments, autograph signings, memorabilia auctions, clay pigeon shoots and dinners to raise funds for retired players.