Danny Ainge reveals Robert Williams pick on FaceTime with Terry Rozier

BOSTON -- Boston Celtics president of basketball operations Danny Ainge unknowingly tipped the team's first-round selection of Texas A&M big man Robert Williams when point guard Terry Rozier called him during a live webcast.

Rozier was appearing on Bleacher Report's online draft show when he was asked to predict Boston's pick at No. 27. Instead, Rozier FaceTimed Ainge, who answered at the Celtics' practice facility and eventually revealed the upcoming pick.

"I got to draft a point guard," Ainge joked when Rozier, Boston's postseason starter while Kyrie Irving was injured, first asked about the team's selection. Pressed for the actual pick, Ainge answered, "It's going to be Bob Williams but…