NFL Draft: Eligibility Rules

The National Football League has its specific eligibility rules for the draft. Through the draft, they decide which players can be selected and their orders in the NFL Draft, the teams that select the players and the contracts managements between the 32 league's teams and the players.
The eligibility rules contain 5 parts of the NFL Draft. First is the player eligibility. A football player that has been out of high school for at least three years is eligible for the NFL Draft. Though the rules do not state that the player must be a college student, but virtually all of the players selected in the draft are from college football teams.
Draft Pick Order, which can help the draft and players be picked smoothly. The order is determined by various factors, and the primary factor is how the team perform in the past NFL season. The first pick goes to the that had the worst record.
Team Eligibility: There are eligibility for players, so do teams.
Supplemental Draft Eligibility: it is the second draft just before the start of a season. Players selected in the Supplemental Draft tend to be players who intend to play another year of college football but for some reason do not.
Holdout Eligibility: this part is about the contract managements.