Hard Knocks Season 21 is to Premiere on HBO

HBO Sports and NFL Films are partnering with "America's Team," the Dallas Cowboys, for an unfiltered all-access look at what it takes to make it in the National Football League. This season chronicles training camp with the five-time Super Bowl champion NFC East franchise.

HBO Sports and NFL Films are partnering with "America's Team," the Dallas Cowboys, for an unfiltered all-access look at what it takes to make it in the National Football League. This season chronicles training camp with the five-time Super Bowl champion NFC East franchise.

HBO Sports and NFL Films are partnering with "America's Team," the Dallas Cowboys, for an unfiltered all-access look at what it takes to make it in the National Football League. This season chronicles training camp with the five-time Super Bowl champion NFC East franchise.

HBO Sports and NFL Films are partnering with "America's Team," the Dallas Cowboys, for an unfiltered all-access look at what it takes to make it in the National Football League. This season chronicles training camp with the five-time Super Bowl champion NFC East franchise.

HBO Sports and NFL Films are partnering with "America's Team", the Dallas Cowboys, for an unfiltered all-access look at what it takes to make it in the National Football League in HARD KNOCKS: THE DALLAS COWBOYS. 

The 15th edition of the 18-time Sports Emmy-winning series spotlights both Los Angeles NFL teams--the Los Angeles Chargers of the AFC West and the Los Angeles Rams of the NFC West--as they prepare to share the spectacular new 70,000-seat SoFi Stadium that is nearing completion in Inglewood, California.

Head coach Jon Gruden leads the Oakland Raiders in his second season, with excitement surrounding the off-season signing of former Pittsburgh Steeler WR Antonio Brown.

Coach Hue Jackson and the team staff make tough decisions as they finalize their team.

Experience NFL training camp as HBO cameras capture the Cleveland Browns in action in this new edition of the acclaimed sports series.

Country music star Brad Paisley visits Browns camp, and QB Tyrod Taylor faces off against the team that traded him to Cleveland, the Buffalo Bills.

The new-look Cleveland Browns journey to New Jersey to face the New York Giants in the pre-season opener.

As training camp begins, all eyes are on QB Baker Mayfield, the NFL's number one overall draft pick and future of the Browns franchise.

Jameis Winston, Gerald McCoy, Mike Evans and DeSean Jackson prepare for the regular season. Rookie hopefuls Riley Bullough, aka "Joe Dirt," and Jeremy McNichols, aka "McWeapon," hope to survive the final cuts, when 37 players will lose their jobs.

The Rams move to Los Angeles in a quest to build an NFL roster and establish a new tradition in Southern California.

Reigning Defensive Player of the Year J.J. Watt and his fellow Texans kick off training camp in Houston. Head coach Bill O'Brien leads 90 players through the first week of drills, and the team travels to Virginia, where they practice against the NFC East's Washington Redskins.