Here is how I see the starting lineups shaking out when it is all said and done. Please keep in mind that Cuonzo Martin told me the staff hasn't discussed starting lineups yet, so this is purely just my own opinion. With that as a disclaimer, I have three possible starting lineups in mind, but I will be VERY surprised if they don't go with #1 or #2.
Starting lineup #1:
Point guard---Tyrone Wallace
Shooting guard---Jabari Bird
Small forward---Jalyen Brown
Power forward---Ivan Rabb
Center---Kingsley Okoroh
Starting lineup #2:
Point guard---Tyrone Wallace
Shooting guard---Jordan Mathews
Small forward---Jabari Bird
Power forward---Jaylen Brown
Center---Ivan Rabb
Starting lineup #3 (Unlikely, but it's the only other lineup that I can realistically see happening):
Point guard---Sam Singer
Shooting guard---Tyrone Wallace
Small forward--Jabari Bird
Power forward---Jaylen Brown
Center---Ivan Rabb
Starting lineup #1:
Point guard---Tyrone Wallace
Shooting guard---Jabari Bird
Small forward---Jalyen Brown
Power forward---Ivan Rabb
Center---Kingsley Okoroh
Starting lineup #2:
Point guard---Tyrone Wallace
Shooting guard---Jordan Mathews
Small forward---Jabari Bird
Power forward---Jaylen Brown
Center---Ivan Rabb
Starting lineup #3 (Unlikely, but it's the only other lineup that I can realistically see happening):
Point guard---Sam Singer
Shooting guard---Tyrone Wallace
Small forward--Jabari Bird
Power forward---Jaylen Brown
Center---Ivan Rabb