Fantasy football is all about projections. Who do you think is going to do well? Who do you think will have a production drop-off from last year, and, more importantly, who has the potential to break out and become a fantasy star? There are a few things that can help you determine who might be a candidate to do so. One of those things is if a guy finds himself with a new team or new teammate.
Think about when Peyton Manning went to the Broncos. That was an immediate upgrade for every single Broncos offensive player. Be aware of personnel changes. Another factor could be if a RB is part of a running-back-by-committee or shared backfield, but then the other guys are traded away or lost in free agency. Suddenly, the guy who had to share carries last year becomes the featured back who gets most of the important touches. One last thing to look at are rookies who have a strong second half of their debut season. The numbers for the whole year might not be fantastic, but you can see the potential. David Johnson comes to mind.