It was a test for EPO - they measure hematocrit, or concentration of red blood cells. It helps endurance athletes.I don't know what test Armstrong was trying to beat but Saline isn't going to help you beat a T/E ratio test.
If anyone claims that the NFL is using a stringent testosterone test-- Do you really believe that giving an athlete 3-24 hours, in which time he can do anything, doesn't help that athlete evade the test? Athletes with millions of dollars can for example carry their own clean urine in their locker at all times, and do a bunch of currently-unknown things that cutting edge drug labs are developing. (For example, what about drawing your own blood when off cycle and purifying your own epitest to inject later to reduce the ratio ?)
Forget about even just what we know about. The U-T article (written by Phan and Zeigler) talks about how the money available to NFL athletes makes it much easier for them to dope relative to Olympic athletes. And even for Olympic athletes, we know you must store old samples to test years later, as new PED science will beat current tests.