Should I go after CMC?

Here’s the scenario. The mccaffery manager is still in the hunt for the last playoff spot. I am locked in already but need to win the next two for a shot at a first round bye. Should I go after mccaffery? Even if it means possibly losing out on a first round bye?

My current RBs are Cook, Sanders, Drake, Edmonds, Mostert, Mattison and McKissic.
WRs are Julio, Jefferson, deebo, Kirk and jeudy.

Thanks everyone!