Manager Ozzie Guillen confirmed on Monday that Turner will be called up from Triple-A New Orleans, and he is lined up to pitch Game 1 of the doubleheader with the D-backs at Chase Field.
Wade LeBlanc is slated to start the second game on Wednesday.
"We're going to see what happens, and after that, we're going to make a move, to see if [Turner] is staying or going back," Guillen said. "He's going to start. It's not my job to say if he's going to stay or not. That's somebody else's job. I'm pretty sure they'd love him to stay."
Part of the decision could be in Turner's hands. If the right-hander has a strong outing, he likely will earn a second start.
Guillen's preference is for Turner to remain, but the club has to figure out how he would fit into the staff. One possibility is going with a six-man rotation.
"I think we should keep him here to see if we can count on him next year, or exactly what stage he is in," Guillen said. "I don't think they're against him staying. We're trying to figure out how to use him. To keep this kid here not to pitch is not any good. That's why we're having this discussion, and we're putting everything on the table."
The highly touted Turner was acquired from the Tigers on July 23 as part of the Anibal Sanchez/Omar Infante trade.
The 6-foot-5, 210-pounder made three starts for the Tigers, and he was 1-1 with an 8.03 ERA. He was dealt to Miami the day after his final Detroit appearance. On July 22, he threw 5 1/3 innings, giving up three runs in a win over the White Sox.
Since the trade, Turner has been impressive at Triple-A New Orleans, where he was 2-0 with a 1.98 ERA in five starts.
"If he stays, he has to be in the rotation," Guillen said. "That's my opinion."