Tbh I don’t know the genuine reason behind it but, it seems to be pretty common practice looking at hundreds of pictures. My first thought was that they’d just fallen down however, it’s always the left pad around the ankle. The only thing I can think of is when in a seated position you can sit on your foot ??♂️? I honestly don’t know. It doesn’t get in the way that much when in game. Something to look in to I guess. Nice spot though. I have seen a few guys with just the right pad as well though. Again, this makes me think the ankle position is deliberate.