"Knock it out of the park" is the only idiomatic phrase. Court and ring are not associated with baseball and thus cannot be used. a baseball diamond refers only to the parallelogram formed by the baseline (from home plate, to 1st, 2nd, 3rd and back to home) which essentially only covers the infield area of the whole baseball field so knocking it out of the infield isn't really viewed as a great accomplishment. That leaves field and while that is the formal term for the place the game is played, it is not used in the idiom knock it out of the park.
For the second part, synonymous with knock it out of the park is hit a home run.
John really hit a home run with that presentation. I think we've got a real shot at a sale.
"Yeah he really knocked it out of the park.
There's also:
He really aced it
He really nailed it
