One thing i see newbies diong more than i think they should is just running one catcher though a hole they make in an opponents line. This leaves him very succeptable to being blitzed and knocked down, and so he can't receive the ball without moving first.
My personal suggestions are as follows. I think there are tree main ways to send catchers through a hole you've broken.
The first is to send multiple potential catchers through the hole you've made. Because he only gets one blitz, he can only knock down one of your catchers. He can however, surround, or at least put TZs on the others, making you either have to catch with penalties, or move first, meaning you can'm move once he has the ball. The following method is one solution.
When you send your catcher through the hole, move other players through as well, but move them so that they prevent the opponent from blitzing your catcher. Make sure not to be base to base with the opposing players, unless the opponent can't blitz through if your guy gets blocked.

The third option is to move your catcher through with a cage around him. In the previous method you're guys were close to his, whereas in this, they're close to your catcher. In one sense this is the stronger of the two, however, if the opponent blitzes your cage you'll either have to block that player away, or dodge with your catcher.