Just to provide more explicit break downs:
So far, with Sullinger NOT on the floor (861 possessions), opponents have taken 752 FGA. Of those, 32 were dunk attempts (4.3%), 210 were layups (27.9%) and 12 were tip-in attempts (1.6%). Overall, opponents attempted 476 (50%) of their 752 shots within 9 feet of the basket, completing 203 (43%) of those close shots.
With Sullinger ON the floor (721 possessions), opponents have taken 626 FGA. Of those, 24 (3.8%) were dunk attempts, 160 (25.6%) were layups and 10 (1.6%) were tip-ins. Overall opponents attempted 309 (49.3%) of their 626 shots within 9 feet of the basket, completing 107 (35%) of those close shots.
So ... slightly fewer dunks and layups with Sullinger on the floor and a big decrease in shooting efficiency on close-in shots with him on the floor.
Our best front-court threesome overall has been Sullinger + Green + Olynyk.