NBA

He started almost all of last year. That's why Brogdon won 6th man.

My guess is their preferred 5 is White Brown Tatum Porzingis Rob. They've always kind of leaned double big with lesser (at least potential) combos than Rob and Porzingis. Rob can pass and screen on the perimeter and Porzingis can shoot. You might not prefer either on the perimeter against great playmakers, but they have enough athleticism that hunting a matchup too hard isn't worth it, especially with the length of the other to potentially lurk. They should work together fine. Tatum is competent if you want to go "small" and play him at the 4, but I don't think you want him to have the paint/rebound responsibilities when he's your offense's engine. He can play a lot of minutes but that's a lot for a season.

Edit: Brad also told us in the press conferences for the Smart trade that they viewed guard as a surplus and wanted another big. (Why I think Brogdon's ego is fine btw; their willingness to pivot to Smart means it was less about him and more about roster imbalance.)