Beat me to it Chameleon.
And when you get a "low testosterone" in Dank's eyes, what is he going to do to raise it?
Tribulus? That has never been shown to categorically work (some poor studies withstanding).
And considering how long it takes for testosterone to start having an effect, you would need to take several levels over a period time to show consistently low levels before you would do anything about it in otherwise healthy young men.
Also if you do determine its low but in the normal range, what do you do? Any medical intervention is doping. Alternatively if its below the normal range thats a medical condition, whats the probability that the list as a whole has a pituitary disorder? Not likely at all.
They're monitoring testo levels to make sure they're not going to piss hot. TE ratios is what they're checking imo.