The RB is looking to build off a strong rookie campaign, and Ray Rice is fine with sharing the workload with him. He's a powerful back who can break big runs at any point.

The fourth-year tight end wants to get more involved in the passing game and he could help offset the loss of Anquan Boldin. He can make a big difference if he emerges in the passing game.

The big defensive lineman is versatile up front, and can stop the run or get after the quarterback. His arrival could make a significant difference on the defense.

He's hoping to break out and win a starting job in his third season. The former first-round pick has shown glimpses of his potential, and he could be a star if he's healthy and consistent.

Jones was the prime X-factor last year, making one big play after another during the Super Bowl run. It's hard to expect an encore, but the veteran can still change a game whenever he gets the ball.