Found dog running into street and booking it down Barton Springs Road, past the Botanical Gardens headed towards Mopac frontage. This was on Friday, 3/27 around 11am/12pm. He is not chipped or neutered, but was well cared for and very friendly. No collar.
He didn't seem scared when I stopped for him and came up to me right away.
Posted on every other online forum/space and put up flyers around the park and neighborhood to no avail.