Burkhead/Abdullah/Lynch Questions

Playing in a 12 team standard. Currently sitting top of the standings at 7-3. My opponent has had Big Ben and AB play already and is projected to comfortably beat me this week (incidentally, it brings our records in line at 7-4 if he does)

Currently have Shady and Marshawn Lynch in my RB spots and Abdullah in my flex but I’m not sure whether I should drop Abdullah or Lynch and plug in Burkhead?