O'sullivan has only been beat twice, by Jr and BJS

Rosado has been beat 11 times by:

Chris Gray
Joshua Onyango (he later avenged this loss)
Fernando Guerrero
Alfredo Angulo
Derek Ennis
GGG
Peter Quillin
Jermell Charlo
David Lemieux
Willie Monroe Jr
Martin Murray

J'leon Love also beat him but the decision was changed to a no contest after Love failed a drugs test