Actually, it isn't. Check out the rest of the thread, and note the signing bonus. Much lower. That means if we need to cut him, the remainder of the amortized bonus that would hit the cap is minimal compared to others. Not only that, the salary itself is probably backloaded, so when you look at the total amount of the contract, rather than the average per year, it's actually quite sane.
It's a damn good deal for the Bills. Salary-cap friendly and pays decent RDE money to a ABOVE AVERAGE RDE. I don't know how you figure double-digit sacks as average.