They don't have to, but they usually do, especially in the top leagues. Occasionally you will see a player whose shirt has got too muddy or ripped or has blood on it, and they change it for a plain shirt with no name or number.
No
Go to a football game
A professional football player is paid to be a part of a team that plays the game of football. Any football player has the goal of getting the football through the goal.
Pheasants versus the Cardinals
A player that greyshirts starts his 5 year athletic eligibility the 2nd semester of his first year. He can then redshirt the following year and have 3.5 years of eligibility remaining. Since football is a first semester sport, he can then play 4 full seasons of football, having practiced with the team an additional 2 years, one as a grey shirt (practicing in the fall but not becoming a student until the spring) and one as a red shirt (enrolled and practicing, but not appearing in a game).
Some major NCAA Football bowls are the Rose bowl, Sugar bowl, Fiesta bowl, Orange bowl, and the BCS National Champion game which was first held in 2006.
it matters on the player. about million to 3 million
If someone is a high school football player why would he be eligible to play in a college football game?
yes people have
yes
It can be great if you love and know the game of football.