Medium-sized brindle dog with blue collar near Parthenon

I found a medium-sized brindle dog this morning around 7:15am wandering near the Parthenon in Centennial Park, Nashville. He's got a short brindle coat, about 40 pounds, a bright blue collar, and a small round silver tag that looks worn. There's a tiny white patch on his chest and one ear that sits a bit floppy. He was friendly with me and other dogs, and he seemed well cared for, not scared. If this sounds like your dog, message me here and we can meet up near the park entrance off West End Ave so you can take him home.