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Sources: Celtics Exercise Option on Robert Williams
![Robert_Williams_Cavaliers_2019_AP](https://www.basketballinsiders.com/wp-content/uploads/2019/10/Robert_Williams_Cavaliers_2019_AP.jpg.webp)
Celtics picked up third-year option on center Robert Williams, league source tells ESPN.
Celtics picked up third-year option on center Robert Williams, league source tells ESPN.
— Adrian Wojnarowski (@wojespn) October 31, 2019
Source: Adrian Wojnarowski on Twitter