this is the most idiotic reply i have ever heard. it's just a blatant LIE. You KNOW this for a FACT?!?! bullsh-t, we're american, we're ameri-centric and proud of it. You're telling me that when they started having the combine x number of years ago, some jackass decided that one of the most minor aspects of the entire draft process had to conform to the metric system? And then you pick an explanation that doesnt even hold up ie 100kg =/= 225? ridiculous.
i'd be willing to bet it's because there would be players who wouldnt even be able to get one on the 315 but they ASSUMED nobody would bomb out with 225. of course, thats a guess, i dont know it for a fact