2015 Outlook: After winning his first rushing title in 2013, Shady struggled early last year behind a depleted Eagles line. But as Philly got its blocking pieces back, McCoy's numbers improved: He registered at least 80 rushing yards in nine of his final 12 games. Alas, that wasn't enough for Chip Kelly, who dealt McCoy to Buffalo, where he'll assume a lead role in Rex Ryan's ground-and-pound attack. RB Fred Jackson -- whose personal motto should be "Depleting the Fantasy Values of Others for a Decade" -- is on hand, and the Bills' blocking and QB situations aren't ideal. But Shady is the NFL's quickest RB, and he's still a top-10 fantasy back.
2015 Outlook: Through the first eight games of his career, Watkins racked up 5 TDs and ranked as fantasy's No. 10 WR. But the former Clemson star limped to the finish line, scoring just once and ranking 56th at the position in the second half of the season. A hefty chunk of the blame belongs to QBs EJ Manuel and Kyle Orton, but life won't be much better this year with Manuel and Matt Cassel under center. Watkins' long-term prospects are bright; he turned 22 this summer and remains a top-shelf talent. But Buffalo's run-heavy offense, coupled with the team's underwhelming QB situation, will keep him from WR1 status in 2015.
2015 Outlook: The only running back 34 years or older to top 500 rushing yards in a season since the turn of the century is Emmitt Smith -- and he averaged 3.5 yards per carry. That's what Jackson will be up against in 2015. Certainly, with LeSean McCoy atop the depth chart, the Bills won't ask Jackson to be their main guy; Anthony Dixon and Bryce Brown will probably also be hanging around. But Jackson has amassed at least 149 touches in seven straight seasons, usually with a more talented option on the roster. This year Jackson will likely be a drain on -- and a handcuff for -- Shady.
2015 Outlook: The Bills were one of the NFL's biggest surprises in 2014, with eight double-digit fantasy outputs en route to finishing as the No. 1 overall unit. Under former DC Jim Schwartz, Buffalo paced the NFL with 54 sacks and yielded the fewest points per drive (1.4) and third-fewest yards per play (4.9). With former coach Doug Marrone out, the Bills will feature Rex Ryan's aggressive scheme. Buffalo's secondary could use some work, but the front seven can go toe-to-toe with any in the league. Mario Williams, Marcell Dareus and Jerry Hughes combined for 34' sacks last season.
2015 Outlook: Plagued by injuries and off-field drama, Harvin has now missed at least one game in six of his seven NFL seasons. What's more, he's appeared in only 23 contests over the past four years. Harvin, 27, remains in his prime and figures to see a hefty share of the Bills' targets this year -- provided, of course, he can stay on the field. (Fun fact: Harvin has never played more than 61 percent of his team's offensive snaps in a season.) The Bills promise to run the ball as much as possible with Rex Ryan and LeSean McCoy in town, so the lack of TD opportunities will limit Harvin's fantasy upside.
2015 Outlook: Carpenter has topped the meaningful nine points per game threshold in both of his seasons in Orchard Park. While there is a correlation between offensive accomplishment and kicker production, it's not an undeniable determinant: Carp was second in field goals made (34) last season on a languid offense that ranked 26th in yardage and 28th in first downs.
2015 Outlook: The Bills gave Clay $24.5 million guaranteed over the winter, a shocking amount for a converted H-back who's never topped 800 receiving yards in any of his four seasons. But at least the transaction makes it clear that Rex Ryan wants a better athlete at tight end than the departed Scott Chandler. Unfortunately, although Clay is the kind of solid all-around player who elevates an offense in myriad ways, he isn't likely to make a level jump with Matt Cassel or EJ Manuel flinging it to him. Expect inconsistent results from Clay and from WRs Sammy Watkins and Percy Harvin.
2015 Outlook: Cassel's 2014 stint as the bridge to Teddy Bridgewater in Minnesota lasted scarcely more than two games, as he fractured bones in his foot in Week 3 and was lost for the year. The Vikings never looked back, committing to Bridgewater by dealing Cassel to the Bills this winter. It's now been five seasons since Cassel was anything more than a game-managing dink-and-dunk artist, and Rex Ryan almost certainly hopes higher-ceilinged EJ Manuel wins Buffalo's QB job in camp. If not, the game-breaking talent of players like RB LeSean McCoy and WRs Sammy Watkins and Percy Harvin would likely be muted by Cassel.
2015 Outlook: What did Manuel do to get himself benched in favor of Kyle Orton last year? If we had to pick one factor, it would be deep-ball accuracy. He completed only 28 percent of his throws that traveled 20 air yards or more (35th out of 42 QBs with at least 15 attempts). Manuel has a tendency to duck his head when a pass rush gets in his face, and his throwing mechanics suffer. Can he improve? The Bills hope so, but they traded for Matt Cassel to serve as an insurance policy. Manuel has a potentially great weapon in WR Sammy Watkins, but to win the starting job, he needs to show he can stand tall in the pocket.