Celtics sign undrafted 7'7" UCF center Tacko Fall

Tacko Fall will sign an Exhibit 10 contract with the Boston Celtics, a source told ESPN. Pencil in July 8th at 430 at Thomas and Mack for your first TACKO Vegas Summer League fix.
— Jonathan Givony (@DraftExpress) June 21, 2019
No idea what an Exhibit 10 contract is, but Tacko Fall will be playing for the Celtics summer league squad.
Celtics summer league schedule:
— Brian Robb (@BrianTRobb) June 21, 2019
7/6 -- 5:30 p.m. – Philadelphia vs. Boston (ESPN)
7/8 -- 7:30 p.m. – Boston vs. Cleveland (NBA TV)
7/9 -- 8 p.m. – Boston vs. Denver (ESPN2)
7/11 -- 10:30 p.m. – Memphis vs. Boston (ESPN2)