According to Tony Jones in one of his most recent articles on The Athletic the Jazz have 3 options for the starting power forward that they are still considering:
"How do the Jazz work in Green?
There are two ways.
One is to start him. He’s not expected to play closing minutes, but he can certainly be a starter for about 20 minutes a night. For comparison, Green played 27 minutes a game last season for the Wizards. Two years ago with the Cleveland Cavaliers, he played 23 minutes a night and was terrific in the postseason as the Cavs went to the NBA Finals. Green can play with the starters while Joe Ingles becomes a sixth man, which leads to Ingles and Bogdanovic playing together in closing lineups. The advantage to that? It puts a bit more athleticism on the floor with the starting unit and gives the Jazz a natural matchup when they face some of the more difficult forwards in the NBA.
The second: Don’t start him. Bring him off the bench in the manner Quin Snyder did with Crowder, around the midway point of the first quarter, and then allow him to play with the second unit at the beginning of the second quarter. It keeps Ingles — whom the Jazz love — in the starting lineup, pushing Bogdanovic to power forward. It gives the Jazz a ton of shooting around Gobert, making any pick-and-roll he’s involved in theoretically difficult to guard. Snyder would need to stagger substitutions in order to prevent Bogdanovic or Ingles from wearing down, but Green’s presence certainly softens the defensive load.
Orrrrrr … the Jazz could start Royce O’Neale at power forward, bringing Ingles and Green off the bench. Word around the franchise is O’Neale has been impressive in his summer work. He’s Utah’s best perimeter defender and has emerged as one of the better wing defenders in the league. O’Neale shot 38.6 percent from 3-point range last season and performed very well in the playoffs. He’s a guy the Jazz think can have a breakout year."