There's always a chance, but in floyd's 49 professional wins, I can only think of 1 time he's been rocked and only a handful of times he's even been hit clean. And as good as mcgregor is, he's been hit clean multiple times by people several leagues below Floyd's skill level
I would love nothing more than for mcgregor to do well, but I can see Floyd taunting him, conor missing everything and getting thoroughly embarrassed. Having said that, conor has made a career out of being counted out and surprising everyone so who the fuck even knows.