Philip Rivers and Devonta Freeman for Mike Evans and Joe Mixon

I have Kirk Cousins as my main QB so I don’t care about Rivers but Freeman is my best RB. Standard 12 League. I am now 1 and 3 for the year and need to change up something to get some wins. Good Trade?

Other RB - DeMarco Murray, Marshawn Lynch, and Derick Henry.
Other WR - Davante Adams, Devante Parker, Jemery Maclin, Terrelle Pryor, Sterling Shepard.