This annual event has been held for over 8 years now. During an August San Francisco Giants game, the Giants along with the San Francisco SPCA allow people to bring their dogs to a baseball game in the bleacher seats. There is also a dog parade on the field before the game. See the San Francisco Giants website or call the Giants for specifics.
Update on 5/19/2022
The Giants are not scheduled to have “bring your dog to the park day” for the 2022 season. Hopefully, they will bring it back next year.