With a win, albeit strong or not, Mayweather will most likely push his way back into #1 spot,
He was pushed out as he took a hiatus and pacquiao had impressive wins,
pacquiao is now in other endeavors i .e running for congress, the boxing community will most likely move him back into #1 place barring a loss
mosely will not move into 1st place, even with a big knockout because the distance the other 2 fighters have placed between them and the competition
The Ring will rank him Number 1 if he beats Shane. Heck they ranked him number 2 just for beating Marquez.
Its obvious Floyd is the better fighter. He would be the P4P Number 1 and rightfully so.