No. Richard Nixon never played football at a level that would cause him to be offered an NFL contract. His second Vice-President, Gerald Ford however was a star college player at the University of Michigan. He was drafted by the Green Bay Packers but turned the contract down.
No US president was drafter by an NFL team. However, President Gerald Ford turned down offers from the Green Bay Packers and Detroit Lions to instead pursue a law degree from Yale.
President Gerald R. Ford was offered a contract to play in the NFL by both the Detroit Lions and the Green Bay Packers. He was never drafted, however.
Gerald Ford
When George Allen coached the Washington Redskins he would have free agent tryouts for anyone that had a dream of playing in the NFL. In 1974, Andre the Giant participated in one of the tryouts and the story goes that Allen offered him a contract but Andre turned it down.
Maybe if the NFL doesn't renew Ea's contract
worms
Depends on the contract you get.
signing a contract
it was a merger with the nfl and afl which eventually turned the NFC and AFC and into the nfl.
nike
They sign a contract with the team they're playing for.