Jim Caldwell has not shared his plan for Thursday night’s final preseason game. He has said it won’t be a blanket deal — like you won’t see the whole starting offense or defense on the field for a certain amount of time. 

The Lions will play the Bills in Buffalo. Kickoff is 7 p.m. and the game is televised on WXYZ-TV in metro Detroit.

Here are five Lions to watch:

1. Corey Fuller is still on the bubble. The second-year wide receiver has one reception in each of the first three games. That came on a 21-yarder in the preseason opener for a touchdown. Caldwell said this week that Fuller has “tremendous upside.” No doubt about that. Trouble is only so many spots are open and it appears Kris Durham and Ryan Broyles have the edge over Fuller who go back to the practice squad.

2. Mikel Leshoure is not a sure bet for the 53-man roster. The running back has been solid in the first three preseason games with 23 carries for 98 yards (4.2 yards per carry). Reggie Bush and Joique Bell will get the bulk of the work, but running backs get hurt so they need depth. Is Leshoure the guy? Or will it be ...

3. George Winn has been impressive through training camp and the preseason. He has 21 carries for 61 yards (29 yards per carry) and a pair of touchdowns. Winn, who has undrafted in 2013, has spent time on practice squads for five NFL teams, most recently Dallas. In the preseason he has spent more time on special teams than Leshoure. Can’t read too much into that, but it could weight in Winn’s favor.

4. Kellen Moore will likely play most of the second half. If Caldwell has made a decision on whether he’ll keep two or three quarterbacks, he hasn’t shared. Moore had a solid effort in the opening preseason game, he could help his chances with a solid effort.

5. Nick Fairley obviously is a lock for the 53-man roster. But if the defensive tackle gets a chance he needs to prove he’s worthy of being a starter once again.

(Follow @PaulaPasche on Twitter. Order her book,  “100 Things Lions Fans Should Know & Do Before They Die’’ here. It’s also available at bookstores.)