I'm not going to make an extensive list as I think that the discussion on this topic would be better (hopefully) than an in depth view. That, and I'm at work and really shouldn't be surfing Buffalo Rumblings right now. Anyways...
- Andre Brown: The Giants running back is 6'0" and 227 lbs. He certainly has the physical size to be a force between the tackles. With Fred Jackson aging to 33 years next season, I could see the Bills in the market for a RB who could fit the system well. The other RBs that might be available are unlikely to be in Buffalo's price range: Maurice Jones-Drew, Ben Tate, Knowshon Moreno, although Rashad Jennings is a possibility.
Dennis Pitta: The fourth year guy out of BYU looked to be on the fast track to becoming a top TE in the league. Unfortunately he suffered an injury that kept him out of the first 12 games of 2013. In his 4 games after the injury he recorded 20 receptions for 169 yards and 1 TD. If he stayed on that pace throughout the course of the season he would have ended with 80 receptions for 676 yards and 4 TDs. In each of the 2 years before he improved substantially on the previous seasons. He caught 40 balls for 405 yards and 3 TDs in 2011 followed by 61 passes for 669 yards and 7 TDs in 2012. If he can continue to build on the success he's already had in the league, he has the chance to become a top TE, but that potential will also come with a hefty price tag.
Brandon Pettigrew: If you look at the past 2 seasons you will see Pettigrew averaged less than 500 yards and 3 TDs. However, in 2010 he caught 71 balls for 722 yards and 4 TDs. In 2011 he caught 83 balls for 777 yards and 5 TDs. So he certainly could be a big time TE, but it appears as though he fell out of favor in Detroit, or the team does not utilize him the way they could/should. Either way, Pettigrew has proven that he could be a reliable target in the passing game and was highly touted coming out of college.
Fred Davis: Perhaps if Davis took the Bills offer last off-season we wouldn't be considering TEs in 2014. However, he elected to return to Washington and all he did was catch 7 passes, all season. He had 3 pretty average years in 2009 and 2010, followed by a breakout campaign in 2011 where he caught 59 balls for 796 yards and 3 TDs. He followed that up with a 7 game season in 2012. He hasn't been utilized since, as evidenced by the 7 receptions in 2013. Perhaps the 2011 campaign was a fluke, or perhaps he just needs a change of scenery.
Dustin Keller: Keller has had a pretty decent career in the grand scheme of things (he had Mark Sanchez throwing to him). He even eclipsed 800 receiving yards in 2011. In 2013 the expectations for him had grown with his new team in Miami. However, he was injured before the season began and never played a snap. In 2012 he only played in 8 games due to injury, so the concern about his health is obviously there. Whether or not it may be a reoccuring theme has yet to be determined. However, that may drop his price tag a little bit. He's played for 2 teams inside the AFC East, perhaps a 3rd is in order?
Brandon Spikes: Spikes is the run stopping LB that could really help our run defense. It would also hurt a division rival. The Patriots seem to be able to get players to play at or below market value and it's unlikely they'll pay Spikes more than they deem he's worth. He could be an immediately upgrade and keep the Bills from investing a pick into a LB (or not). He's also only 26 years old.
- Karlos Dansby: Dansby was linked to Buffalo last off-season but like Davis, he elected to return to his former team. He's now 32 years old, but had a successful season for Arizona which kept them in the playoff hunt this year. He registered 122 tackles, 6.5 sacks and 4 INTs in 2013. With his age, and the way he played in 2013, it's unlikely that the Bills dish out a big contract to bring him in, but you never do know.
Obviously there are other positions that we may be targeting such as a veteran QB, LG, RT, RE, CB depth, and FS if Jairus Byrd leaves, so this list is not all inclusive of all positions, just the handful I thought really could be possibilities. Feel free to add on to the list or dispute any I listed.