Hard Knocks is a reality sports documentary television series produced by NFL Films and HBO. The show was first broadcast in 2001, and the current 2019 season is the fourteenth. Each season, it follows a National Football League team through its training camp and covers the team’s preparation for the upcoming football season. The series shows the personal and professional lives of the players, coaches and staff, including their family life, position battles, and even inside jokes and pranks. It

Source:: https://en.wikipedia.org/wiki/Hard_Knocks_(TV_series)