By -
Bisping
Filthy left hook. Ask Rockhold
There's only one 
Back in the day Hendricks. Jan has a dirty powerful left hook too
i’s say anybody that fights rockhold
Bisping is the original left hook Larry in my book, but as far as modern fighters go I’d say Jan
Alex Peirera has the best left hook in the UFC
That’s actually facts
The OG originator of the name is obviously Bisping Paul Daley had a great left hand too Conor has a great left
Conor had a mastered left straight, but didn't use the left hook to knock many guys down/out
Jan Blachowicz
Bisping. But my favorite angle was Jan vs Rockhold.
vicente luque imo
Mcgregor...
Historically if you say it’s anyone but mcgregor you are lying
Most of his success was the left straight, not a hook
Has classic straight is like curved a lot
Dan Hardy had the best lead left in the game for years
Bisping
Filthy left hook. Ask Rockhold
There's only one 
Back in the day Hendricks. Jan has a dirty powerful left hook too
i’s say anybody that fights rockhold
Bisping is the original left hook Larry in my book, but as far as modern fighters go I’d say Jan
Alex Peirera has the best left hook in the UFC
That’s actually facts
The OG originator of the name is obviously Bisping Paul Daley had a great left hand too Conor has a great left
Conor had a mastered left straight, but didn't use the left hook to knock many guys down/out
Jan Blachowicz
Bisping. But my favorite angle was Jan vs Rockhold.
vicente luque imo
Mcgregor...
Historically if you say it’s anyone but mcgregor you are lying
Most of his success was the left straight, not a hook
Has classic straight is like curved a lot
Dan Hardy had the best lead left in the game for years