You can only challenge another part of a play. If the spot of the ball was challenged, the spot of the ball cannot be challenged again.
NFL Challenge was created in 1985.
NFL Challenge happened in 1985.
You Cant
There is no madden challenge in Madden NFL 10.
If a NFL Coach wins the challenged play, he still loses one of his two challenges. If both challenges succeed, then the team is awarded a third challenge.
yes
Popcorn kernels
47%
An NFL coach must win both challenges in order to gain a third.
Rex Ryan
77%
Around 40-50 percent.