Trade Help

In a ppr league. My workhorse D. Johnson is on IR…obviously. I need a second RB to pair with Miller
My other RB 1. A trade was proposed to me for Martin & Diggs, I would receive Gurley. My 3 starting WRs are Fitz, D. Thomas and Diggs. I have Maclin, Lee and J. Brown on the bench. Any help with accepting or declining this trade would be great. Thanks.