Fantasy Upside
Brandon LaFell has improved his seasonal stats every year in the league, but has failed to really ever distinguish himself or truly "break out." If he can carve out a role on the Patriots similar to what he had in Carolina, he'd have a flex spot start value on a fantasy team's bench.
Fantasy Downside
It's possible LaFell doesn't make the final roster. Even if he does, he may stay buried on the depth chart most game days. Along with all this risk, comes rather limited upside.
Bottom Line
We're currently ranking LaFell as WR111 in PPR and WR112 in standard. That's about all you need to know. You can safely ignore and avoid LaFell.