The free agency period of the NFL offseason always promises to deliver on surprises http://www.bengalscheapstore.com/germaine-pratt-jersey-cheap , massive contracts and cutthroat bidding wars between teams. As always, the most recent one did not disappoint, and there were plenty of players who were inked to new deals, with new teams all over the league. It's a very optimistic time for many fanbases; everyone is convinced that the player their team landed is going to be the catalyst for success in the upcoming season. It's a nice energetic boost just before the draft, giving everyone the idea Ryan Finley Jersey , or sometimes the illusion, that their roster is in good shape.However, the reality is that the results produced by these free agents will be all over the map in terms of quality. As is the case during every free agency period, some players signed to teams that provide them with an ideal situation. Likewise, there were some players who opted for more money http://www.bengalscheapstore.com/renell-wren-jersey-cheap , but will be forced to play under questionable circumstances. Some of these players will ride the wave of success with their new franchise, and others will crash and burn almost immediately. Let's take a look at how the 2017 NFL free agency class stacks up.Ranked below are 20 major NFL signings during the free agency period, and predicting how they will fare on their new teams. Being a running back in the National Football League is one of the toughest jobs in the game. After all, RBs end up taking a ton of big hits from massive defensive tackles and linebackers, every time they step on the field. The hits these guys take tend to add up Michael Jordan Jersey , which is why most players at the position usually retire in their early-30s, if not sooner.A top back can go from a superstar to backup in seemingly no time; it happens just about every year. Moreover, we are also seeing more teams use two running backs. There are multiple reasons that teams are beginning to use the two-RB approach. Firstly, some players tend to be better pass catchers, while others excel at running between the tackles. Having skill position players that specialize in one area gives offensive coordinators a great deal of flexibility. Moreover http://www.raidersauthorizedshops.com/authentic-hunter-renfrow-jersey , the other advantage to using multiple backs is that one player isn’t tacking all the damage from being tackled repeatedly, as was mentioned earlier.Given that so many teams use two, or in some cases even three backs, sometimes it’s difficult to determine who the starting RB is. However, for our purposes Zach Brown Jersey , we are going to focus on the players who are on top of their respective team's depth charts.With that in mind, it's time to take a look at 20 of the NFL’s top running backs. Some of these stars will likely be going strong for years to come, while others may lose their jobs (or retire) in the very near future.