At this point in training camp, and with the preseason winding down, this is where coaches are expecting players to make an impact.
If they do, then they get a roster spot.
However if they don't, then good luck on the practice squad (best-case scenario).
And for the rookies who have been playing, this is the NFL's version of final exams, and could determine how much playing time is given in the real season.
Including Cam Newton, here are seven rookies who have the most riding on the fourth week of the 2011 NFL preseason.