According to David Pick (European Woj) the Boston Celtics will sign Daniel Theis
Source: Euroleague's Daniel Theis, a Bundesliga winner with Bamberg, is bound for Boston Celtics till 2019.
— David Pick (@IAmDPick) June 19, 2017
Theis is a 6’9’’, 25 year old forward/center from Germany. He’s been a professional since 2011 and has played with Lowen Braunschweig, Ratiopharm Ulm and Brose Baskets in the German Basketball Bundesliga. In 2015-2016 and 2016-2017 he was a German BBL All-Star Starter and was named the Defensive Player of the Year in 2016-17.