Why, what exactly are you scared of? He will play special teams and get maybe 20 snaps with the offense with a couple runs, maybe some screens and prob one or two deep ball tries. Harvin is a gadget player and after being with the Jets all of one week wont be the reason they win or lose. I'm more worried about average Decker looking like an all pro vs this secondary.
Since MetLife Stadium opened in 2010, the #Bills are 0-4 there against the Jets and have been outscored 141-79.