Five Lions on the roster bubble who deserve a closer look

The Detroit Lions' first preseason game provided us with a lot of information about certain position battles, but at least for this week, I didn't feel the need to make any changes to my most recent 53-man roster prediction. Five players who are on the roster bubble stood out against the Cleveland Browns, though, and they could cause me to reconsider some of my predictions going forward. Here's a look at each of them:

Quarterback: Kellen Moore

As nice as Moore's performance was, it's pretty clear that Dan Orlovsky is still the Lions' backup quarterback for the time being. As a result, with only two quarterbacks on my 53-man roster, Moore is the odd man out. That could definitely change in the coming weeks, though. Not only could Moore do enough to make the team as the Lions' No. 3 quarterback, but if we see more of the same from him going forward, he could make Orlovsky the odd man out by simply winning the backup job.

Running back: George Winn

Winn carried the ball six times for 39 yards and caught the ball three times for 23 yards against the Browns. Yes, he did turn the ball over on a fumble, but he looked impressive as a runner. We have to keep in mind that he wasn't exactly going up against starters, and the blocking in front of him played a big role in his success, but he looked more assertive with the ball than Mikel Leshoure, who had eight carries for only 31 yards. Considering Leshoure is far from a lock to make the team, it's not like Winn is suddenly on the verge of a roster spot, but he could make it tough for the Lions to cut him if he keeps running like this in the final weeks of the preseason.

Wide receiver: Corey Fuller

There's a lot of uncertainty at wide receiver right now. Jeremy Ross is safe simply for his return skills, and I can't see the Lions cutting Ryan Broyles as long as he's healthy. But it's anybody's guess right now for the final one or two spots at the position. The Lions could keep two of Kevin Ogletree, Kris Durham and Fuller, or they could simply keep one of them. Ogletree has had a strong camp, and Durham started in place of Calvin Johnson against Cleveland, so they are likely ahead of Fuller at this point. However, Fuller was on the receiving end of the Lions' game-winning touchdown, and he has also seemingly had a strong camp. If Fuller can show enough in the next few weeks, there's a chance he could make the team over Ogletree and/or Durham.

Defensive end: George Johnson

Johnson has probably been the biggest surprise of training camp for me. He went from being viewed as nothing more than a camp body to getting some reps with the first-team defense (thanks in part to Ziggy Ansah's absence). Based on what Johnson has done so far in camp, he's probably deserving of a spot on the 53-man roster. The problem is there just doesn't seem to be enough room at defensive end. We know Ansah, Jason Jones and Devin Taylor are going to make the team, and the Lions aren't going to cut fourth-round pick Larry Webster. It also doesn't seem like Darryl Tapp's spot is in question at all, so it's a situation where Johnson would have to make the team as the Lions' sixth defensive end. It's tough to imagine a scenario where the 53-man roster has 10 defensive linemen, but if Johnson keeps it up, perhaps the Lions will have to seriously consider making room for him.

Safety: Isa Abdul-Quddus

Much like the situation at quarterback, it's unclear right now how many spots will be set aside at safety. The Lions could simply go with four (as I did in my last 53-man roster prediction), leaving Abdul-Quddus as the odd man out. In that scenario, he would have to beat out DeJon Gomes to make the team. In another scenario, however, Abdul-Quddus could make the team as the fifth safety if the numbers work out in his favor. He's not only trying to outperform Gomes, but he's also trying to do enough to take away a spot from another position. Considering he had an interception and a team-leading six tackles against the Browns, he's off to a pretty good start.