Sparring partners are never of to highly rated. Very few are the total package which is what makes that Mosley story so unbelievable. Some guys are used for speed, others power, some technique ect. I mean Toney's cheif sparring partner is the guy Sultan just KTFO. Pacquiao had some euro guys in sparring and had Shadi Hamsho and Vincente Escobedo as his main guys for the third EM fight. Sparring partners don't mean much.

I know Team Palle brings in some quality guys for Kessler. And there are some exceptions but there is a reason the top fighters cycle between many different partners.