Well... yes. Many boxers will fight hands down at times and a few boxers are known for it being a feature of their style - Maravilla and Hamed have been mentioned already - but even they would get their hands up when under attack if their feet and reflexes couldn't get them out of harms way.
Maravilla was exceptional in there with that style,just beautiful to watch.Was devastated he sold himself out to Cotto smh. Guy came in with long ass trunks to hide the knee braces ffs!