Box Hops

I like multifunctional exercises that can accomplish various skills that are vital to a softball player. They are proficient in mimicking skills on the diamond. A push up transitioning into a box hop teaches an explosive transfer from a low to high position. So think of this way; softball is an incrediblely transitional game. We rarely perform one movement. We perform a movement that leads to another movement, think hitting into running, fielding a grounder and throwing, running then diving, catching then throwing. You get the picture. When we train our athletes to develop in this fashion than the movements on the field biomechanically are already ingrained into their musculature, their force production and their kinetic chain. In other words they've trained their body to react in this manner. You can also add a ton of variations into this exercise; walk out push ups, med ball push ups, burpee box hops, add a ball catch and throw at the box hop portion. There's a limitless amount of options. Try starting with one and grow from there.
Make your players better.