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There is a semi-opaque trap to including Vargas in the rotation after Lee's return...
That being the fact that when BEDARD returns, it will be almost impossible to keep Vargas (and RRS with Vargas, anyway) in the rotation then.
So what if Vargas pitches well for three weeks if you're doomed to relieve him of duty anyway?
If the afore is true, then you might as well drop Vargas THIS cut, so that the others can compete for the last job and provide you the most data possible.