There aren't many hitters who like facing knuckleball pitchers. They may not be intimidated by them, but they sure are thinking about them before they go into the box.
I couldn't throw a knuckleball if my life depended on it.
You know, catching the knuckleball, it's like trying to catch a fly with a chopstick.
Look for the seams (on a knuckleball) and then hit in-between them.
You don't catch the knuckleball, you defend against it.
It's (Phil Niekro's knuckleball) like watching Mario Andretti park a car.
Throwing a knuckleball for a strike is like throwing a butterfly with hiccups across the street into your neighbor's mailbox.