Report: Celtics re-sign Tyler Zeller Posted Jul 23, 2016 After reportedly agreeing to terms with Gerald Green, the Boston Celtics also reportedly locked up Tyler Zeller to a guaranteed two-year deal, and then filled out the roster with Demetrius Jackson and Ben Bentil. Zeller gives Boston a big man with real height who remains a better rim protector than the departed Jared Sullinger and who can play extended minutes. (CBS Sports)