Celtics sign Daniel Theis, Ante Zizic, Jayson Tatum

The Celtics announced the signings of rookie Jayson Tatum and 2016 draft pick Ante Zizic and the team has also inked German forward Daniel Theis to a two-year deal.

Tatum was the third overall pick of this year's draft after spending his freshman season with Duke, where he averaged 16.8 points and 7.3 rebounds per game.

Zizic, the 23rd overall selection last season, spent this past year competing in both Turkey and Croatia.

Theis is 6-foot-8, 243 pounds and at 25 years old is still considered more of a project offensively and more reliable on defense and as a rebounder.