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.
You don't catch the knuckleball, you defend against it.
It's (Phil Niekro's knuckleball) like watching Mario Andretti park a car.
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.
I couldn't throw a knuckleball if my life depended on it.
Throwing a knuckleball for a strike is like throwing a butterfly with hiccups across the street into your neighbor's mailbox.