How many fighters do you see actually using it. Even if its here and there. They teach it in Gyms. For example, someone throws a jab and you parry that with your right hand from orthodox stance then through a cross or a left hook. Hopkins does a little.
Floyd Mayweather fight and he parries a lot mostly when his opponent jabs. Another good example is Pernell Witaker. You just have to look close enough and you'll see a lot of fighters using it
Pavlik did it a lot whenever he was in with an opponent with a decent jab. Watch the two Taylor fights and the McKart fight.
Winky Wright parryed a lot, Floyd Jr does as well, a good amount of fighters use parry's it's hard to notice because it's a slight very fast movement and there usually also moving there upper body or countering or smack a jab down launch your own or a quick right hand etc.
