Add another boxer to the list of people calling out Conor McGregor ...
This time, it's "Sugar" Shane Mosley saying the UFC star wouldn't have a scintilla of a chance if the two stepped inside of a boxing ring.
Mosley admits McGregor would have the upper hand in an MMA fight -- but Shane says he's too smart to put himself in that situation ... and knows exactly what happens when combat fighters try to expand outside of their sport.
