The Bengals are required to fine Hendrickson $50,000 for each day of camp he misses. In addition, any preseason or regular-season game he misses would result in $877,777 of salary lost, according to Spotrac.

At the start of NFL training camp, player holdouts are some teams biggest issues heading into the new campaign.

The Cincinnati Bengals still have not locked down their first-round draft pick from this year as Shemar Stewart threatens to re-enter next year's draft over a contract dispute. With Stewart's future in question and Trey Hendrickson also threatening to hold out this season,

The Bengals should once again have a prolific offense, but what about the rest of the team? The franchise is conducting a great NFL experiment.

When the Cincinnati Bengals report to training camp on Tuesday, Trey Hendrickson won't be there. The Bengals star is currently about 800 miles away from Ohio in Northern Florida, which means one of two things happened: Either he forgot he was supposed to report to training camp or his contract standoff with the Bengals has gotten so ugly that he decided not to show up.

Holdouts are fairly uncommon for NFL rookies, but that doesn't mean they don't happen. Here's a look at the longest.