I challenge all Floyd fans. Can you give me the link?

They won't give you any. The "fear of needles" are lies peddled by Floyd fans. What Pacquiao said was blood extraction makes him weak. And he said this last 2005 after the Morales fight. Although a few mL of blood might not be an issue for most people, some have psychological aversions against it and psychological state will surely translate to and affect the physical state. Mayweather and company saw this video and used the random test to try to get the psychological advantage over Pacquiao. But that's a non-issue now since everyone knows Pacquiao has already agreed to unlimited random testing. And when Pacquiao agreed to everything, Mayweather suddenly is not thinking about boxing and wants $100M.