Celtics make Tacko Fall signing official and three others

The Boston Celtics announced the signing of four players Thursday, including Tacko Fall,  the 7-foot-7 summer league sensation who will be in camp with an opportunity to compete for the team's final roster spot.

The Celtics signed second-round draft pick Tremont Waters and undrafted rookie Max Strus to their two available two-way contract slots, which allows them to spend time with both the parent club and the Maine Red Claws of the G-League.

Boston also announced the signing of Fall and fellow summer league standout Javonte Green.

Fall signed an Exhibit 10 with Boston after going undrafted and remains in line to collect up to $50,000 if he is waived at the end of training camp and reports to the Maine Red Claws as one of Boston's affiliated players. To do that, Boston would have to eventually expose Fall to waivers and they might be more inclined to elevate him to the parent roster or a potential two-way slot if they were to elevate either Waters or Strus.

Green is coming to camp on a partially guaranteed deal that will allow him to also compete for a final roster spot, and offers potential enticement to consider the G-League, though a heftier payday could await overseas if he doesn't make the roster.

The signings of Fall and Green allows the Celtics to maintain flexibility with an open roster spot while still bringing intriguing prospects to camp. Boston opened that roster spot when it waived 2016 first-round pick Guerschon Yabusele earlier this month.

The 23-year-old Fall averaged 7.2 points, 4 rebounds, and 1.4 blocks while shooting 77.3 percent from the floor during summer league. He became a sensation with his large size and wingspan, and dazzled with his tippy-toe dunks and obvious potential. The Senegal native went undrafted in June after four years at the University of Central Florida.

"Tacko is fun to watch," Celtics president of basketball operations Danny Ainge said last week. "He makes me laugh. Some of the plays he makes are hilarious because you just don't see them. Guards get in a bind and they just throw the ball up in the air, then Tacko grabs them and makes tip-toe dunks from under the basket. It's just like a senior in high school playing against fourth graders sometimes out there.

"He's a great kid, he's working really hard. We want to take his development very very seriously. He's a high priority for us to try to really develop into a player."