Sophia, your catcher, has just had a straight-on collision with a base runner at the plate, and she took a helmet right in the stomach. She's not getting up, but writhing on the ground. Even as you conduct a primary and physical assessment, you suspect she's "had the wind knocked out of her," a common description of solar plexus spasm.
Sophia is still unable to inhale and looks to be in pain and very scared. You're sure that she is having a solar plexus spasm.