Lost golden retriever puppy named Max with a red collar near the public park in Heartland, Florida.

I lost my golden retriever puppy named Max near the public park in Heartland Florida. He slipped out of the yard while I was gardening on Thursday afternoon and went running towards the park. Max is quite friendly and has a red collar with my phone number on it. If you see him, please let me know. I'm really worried about him!