#23 is usual suspect Aaron Maybin.
… The 11th overall pick in the 2009 draft, Maybin was supposed to be a hybrid pass rusher who could play in a 3-4 or a 4-3. He's got zero sacks, was a healthy scratch at times in 2010, and the first entry that comes up as an auto-fill when you type his name into Google is "Aaron Maybin bust."
After his appearance last year on Deadspin's worst players of all time list, this is a movie we've all seen before.
Who is slightly more interesting is #18 Akin Ayodele.
Signed after injuries beset Buffalo, Ayodele combined with Andra Davis (who also ended up getting hurt) to serve as the slowest group of inside backers in recent memory. Despite playing behind an elite nose tackle in Kyle Wiliams, the Bills still had the league's worst run defense with Ayodele at the helm.
I've long been vocal about my distaste for Ayodele's prominent role in our defense, and I'm glad to see someone else agrees. He is about as invisible as a linebacker can be, which is the death tell to hopes of an effective run defense. Someone has to pay the bill for last year's abysmal performance against the run.