They work on the same field. Case in point: With Revis on the #1 receiver, Ryan rolls his coverages towards the #2 receiver, giving the other corners help. This was why Sheppard and Lowery were both in the top 6 in opposing completion percentage last season. Cromartie will get that same help, so his numbers will be better, and that's ignoring playing to his strength of bump and run man coverage that he hasn't been able to play in the last couple of years.
