Adam Schefter explains that Blake Bortles has not developed how Jacksonville had hoped he would, so the starting QB job might be given back to Chad Henne. (0:45)

JACKSONVILLE, Fla. -- Jacksonville Jaguars coach Doug Marrone has a tentative plan for his quarterbacks during Thursday night's preseason game against Carolina but he won't be announcing a final decision until Wednesday night.

Marrone said Monday that he wants to see how Blake Bortles and Chad Henne look during Tuesday's practice and Wednesday's walk-through just in case he decides to change his mind.

"I'm going to make sure I tell the quarterbacks in what I feel is a good amount of time to get themselves prepared, so it'll probably be when we're at the hotel the night before the game [is when] I'll probably talk to them about it," Marrone said. "I just want to get all the information. I want to make sure I'm comfortable with the direction I'm going. I just want to make sure I'm doing the best for the team.

"I just want to get all the information," Doug Marrone said of waiting to announce Thursday's starting QB. "I want to make sure I'm comfortable with the direction I'm going." David Rosenblum/Icon Sportswire

"Like I've said, I've already written a couple scenarios down. I feel good about one of them so I have a lot a good reasoning for it so I'm going to see where it goes."

Marrone opened up the competition after Bortles turned in another lackluster performance in last Thursday night's 12-8 loss to Tampa Bay. The third overall pick in 2014 completed 8 of 13 passes for 65 yards but he twice missed receiver Allen Robinson on deep passes. He slightly overthrew Robinson down the sideline and another pass to a wide-open Robinson was badly underthrown.

Bortles also badly threw behind Robinson on an in route.

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Henne completed 6 of 10 passes for 44 yards against the Bucs. His first throw was a strike to Keelan Cole in the end zone that Cole dropped. Robinson also dropped a touchdown pass later that possession.

Bortles had an up-and-down training camp, which included a five-interception practice on the first day the team was in full pads. He also threw a pair of interceptions during an Aug. 13 practice and Marrone decided to get Henne reps with the first-team offense against the Bucs.

Marrone said he has not told Henne and Bortles -- who split first-team reps on Saturday, Sunday and Monday -- about his tentative plan.

"I'm just going to to see how the practices go," he said. "We've got another big day tomorrow, a good day. Both of them are doing fine so like I said I feel like I have a very good plan for myself and then I'll make the quarterbacks aware of it after when we get closer to the game."