Matt Waldron throws it a little different than most knuckleball pitchers. He throws it harder (76.2 mph) and less often than previous knuckeballers like Tim Wakefield or R.A. Dickey. Padres manager Bob Melvin said: “It makes his fastball better. It makes his breaking ball better. It’s a pitch that he’s throwing enough now where you have to look for it a little bit, so it’s making everything a little bit better.”
This is not a big matter of the catcher? If you have a catchballer motherfucker maybe you can stretch a bit.
It definitely helps and some catchers cannot cope with the unpredictability of the knuckleball. I remember that Tim Wakefield had Doug Mirabelli as his personal catcher, but even he had trouble with catching it sometimes, especially when the wind was blowing towards the pitcher