NFL players are not required to attend college. Still, it is quite difficult for a football player to gain the skills necessary to play in the NFL without playing college football. Still, a few European soccer players have been kickers in the NFL.
About 2.4%. 9000 become college players, and 215 become NFL players. The reference link for this information is no longer valid. "While many young people every year set their goals on becoming NFL players, it is extremely difficult to reach that level. Statistically of the 100,000 high school seniors who play football every year, only 215 will ever make an NFL roster. That is 0.2%! Even of the 9,000 players that make it to the college level only 310 are invited to the NFL scouting combine, the pool from which teams make their draft picks."
< 1% of College Players < 0.01% of High School Players
Mike Anderson of the Broncos was a US Marine.
All current NFL players have attended a college. However, some players entered the NFL draft before they graduated from college. To get into the NFL, you must first be drafted by an NFL team in the college draft. Therefore, you would have to go to college to get to the NFL.
No. Not all college football players go to the NFL, not even all division 3 college football players go into the NFL
If you're physically able to, they will ask you to. If you turn them down, most NFL teams will take that as a sign of disrespect to the NFL. Many players do not attend the NFL combine. Players are invited to participate, but many players choose not to attend. It is helpful, but not necessary to improve you draft status. It is not considered disrespectful to the NFL to not attend the combine.
NFL=46% NBA=25% Soccer= 28-43%