Upshaw's Opposition to Blood Testing for HGH

[Sheriff Gonna Getcha]

Could someone please explain to me how Gene Upshaw can, with a straight face, oppose the blood testing of players for human growth hormone (HGH)? My understanding is that Upshaw and the NFLPA assert that the tests are unreliable and should not be used until they become more reliable. News outlets, however, are reporting that such tests are fairly reliable and other sports organizations use them.

I would be most grateful if anyone could shed some light on the issue. I am particularly interested in learning how reliable such tests are and if Upshaw has any other objections.