Complex sentence: The game on August 9 featured Molina's slam coming one pitch after the appearance of the "Rally Cat", running into center field, before picked up by a groundskeeper who got scratched and clawed for his trouble.
Split into simpler sentences: The game on August 9 featured Molina's slam coming one pitch after a cat, subsequently known as the "Rally Cat", ran into center field. The cat was picked up by a groundskeeper, who got scratched and clawed for his trouble.