Things change quickly in the NFL. Injuries and role changes shift the value of players and it's important to be ahead of those changes. Some of the players on the rise and decline are obvious, while some aren't obvious to the masses yet. Here are some players with the stock up and down heading into Week 5.
RB Kerryon Johnson, Detroit Lions
It didn't appear that Johnson would be unleashed after the first two games of the season. After Theo Riddick was cut, Johnson moved up draft boards with the hopes of getting a bigger workload, especially in the passing game.