There are only five teams eligible to appear on HBO's "Hard Knocks" this season.

Rules prevent teams with first-year coaches, teams that made the playoffs within the last two seasons, and teams that have been featured on "Hard Knocks" within the last 10 years from appearing on the show.

The San Francisco 49ers, New York Giants, Oakland Raiders, Detroit Lions and Washington Redskins are eligible, but a report has indicated that the 49ers won't be featured.