1.   But Parcells said he hates the challenge system that was tested during the preseason.

2.   Even Giants owner Wellington Mara is considering voting for a plan this year that includes a challenge system.

3.   The Cowboys even managed to whiff against the NFL instant-replay challenge system.

4.   The problem, according to most coaches, is that all involve a coach challenge system.

5.   The objections to the challenge system came mainly from the coaches, who have been split among a number of proposals.