Large, younger (1-2 years?) pit bull, mostly white, but with significant brown spots. Unaltered male. Friendly and clearly trained. (Knew how to sit, lie down & shake). Had a collar, but no tags or leash. Running around Wellesley/Highview this evening around 8:00 pm. Called animal control. He will be at the Animal Rescue League tomorrow. I would have kept him here overnight, but this friendly guy had way too much energy. I'm a strong person, and I could not have held him if he'd wanted to run. Hope he finds his home.