In the 2004 NFL draft there were 167 players drafted in a total of 6 rounds. More players are brought in during camp whom did not get drafted with the hopes of making a team. "Camp players" fill the need as practice players do during the season. Your NFL chances of making a team is an extreme in terms of the overall number of college athlete seniors available each year. Your hearing this from a formal 2 year NFL player 1979-81 and 1 year USFL player.