Watch trailer for 'A Football Life: Nick Saban'

The critically acclaimed NFL Films original series "A Football Life" returns with the story of head coach Nick Saban on Friday, 9/17, at 9 p.m. ET on NFL Network.

Hall of Fame wide receiver Calvin Johnson gets inducted to the 2021 Pro Football Hall of Fame.

Hall of Fame wide receiver Calvin Johnson explains why he retired after the 2015 NFL season.

Hall of Fame wide receiver Calvin Johnson talks about breaking Jerry Rice's single season receiving yards record in 2012.

Hall of Fame wide receiver Calvin Johnson discusses his Georgia Tech football journey.

Hall of Fame wide receiver Calvin Johnson explains why he ran the 40-yard dash at the 2007 NFL Scouting Combine.

Hall of Fame wide receiver Calvin Johnson explains why his early athletic career was cut short.

'A Football Life': Former Pittsburgh Steelers linebacker James Harrison makes his return to the NFL and goes to New England.

'A Football Life': Former Pittsburgh Steelers linebacker James Harrison moves on from the NFL to raise his two kids

Former Pittsburgh Steelers linebacker James Harrison recaps his intense workouts and Super Bowl XLIII pick-six.

Former Pittsburgh Steelers coach Bill Cowher explains how former linebacker James Harrison got his first NFL start.

Former Pittsburgh Steelers linebacker James Harrison recaps his football journey from high school to an undrafted NFL player.

Former Pittsburgh Steelers linebacker James Harrison shares what he learned from his mother.

How former Pittsburgh Steelers linebacker James Harrison became an intimidating on-field presence.

The critically acclaimed NFL Films original series "A Football Life" returns with the story of former Pittsburgh Steelers and New England Patriots linebacker James Harrison on Friday, 9/24, at 9 p.m. ET on NFL Network.

University of Alabama head coach Nick Saban shares how he accomplished winning multiple National Championships.

How University of Alabama head coach Nick Saban impacted the Miami Dolphins in his short stint in Miami.

University of Alabama head coach Nick Saban talks about his relationship with New England Patriots head coach Bill Belichick.

University of Alabama head coach Nick Saban details how his father impacted his coaching career.

After being selected No. 2 overall by the Los Angeles Rams in 1983, Hall of Fame running back Eric Dickerson had the greatest rookie season a running back has ever had, rushing for 1,808 yards and 18 touchdowns.

Walter Payton won a Super Bowl with the Chicago Bears in 1986. Check out why Payton's world championship was an unenjoyable experience.

Take a look at Walter Payton's approach to football which would enable him to become one of the greatest players in NFL history.

Take a deeper look at the relationships Walter Payton held with his family and fullback Matt Suhey.

Walter Payton wreaked havoc on opposing defenses throughout his NFL career. After football, Payton had to plow through his toughest opponent, cancer.

After a couple tough seasons and injuries, Hall of Fame running back Eric Dickerson began to hate the game of football. It would take the back being finally remembered for his accomplishments on the field for him to remember why he fell in love with the sport.