Raiders' 53-man roster projection offers intriguing options at receiver

LAS VEGAS -- The Las Vegas Raiders are scheduled to open the season Sept. 13 at the Carolina Panthers. Jon Gruden looks to try to make the playoffs in Year 3 of his second stint with the Silver & Black. The Raiders have only made the postseason once in the previous 17 years and haven't won a playoff game since the 2002 season. Here is a 53-man roster projection:

QUARTERBACK (3): Derek Carr, Marcus Mariota, Nathan Peterman

Stop me if you've heard this before, but Carr has looked extremely sharp and in command in camp. Mariota, not so much. In fact, he has had trouble throwing the ball and became "day-to-day" late in camp with an undisclosed issue after dealing with offseason shoulder and ankle injuries. Still, a source said each injury was "fine." Peterman was stashed on IR last season. Might the Raiders do the same with Mariota now to get an extra roster spot?