The hijinks you're witnessing happened between innings while players were warming up and dogs were brought onto the field.
A German shepherd noticed that there were in fact baseballs at the baseball game. Naturally, he then sprinted at one of the balls -- but was distracted by, mother of god, yet another ball. A player standing near second base was kind enough to roll a ball for the German shepherd to chase down, which the good boy did with admirable grace and speed.
And the crowd went wild.
After being scratched behind the ears, the dog was retrieved and spent his short remaining time on the field trying to escape again before a player rolled a ball over just for him to take home.
If this isn't what baseball is all about, we should probably change baseball.