Valentine agreed to a G League contract with the Maine Celtics on Friday, Jay King of The Athletic reports.
Valentine started the season with the Cavaliers and made 22 appearances with the squad before he was traded to the Knicks and subsequently waived. He then latched on with Utah, but he made just two appearances -- totaling 19 minutes, five points, four rebounds and one steal -- before his 10-day contract expired Thursday. He'll attempt to work his way back onto an NBA roster through his time in the G League.