I have been offered the following 1-for-1 trade. I give up Steve Smith and receive Rashard Mendenhall. My team is as follows

RB- LeSean McCoy, McFadden (hurt), Benson (suspended), Montario Hardesty
WR- Smith, Colston, DeSean Jackson, AJ Green, Deion Branch

My league plays 2 WR, 2RB, and 1 Flex. I obviously have 4 solid WR and can only play max 3, but Smith has been a stud all year and Mendenhall….hasn’t. But I do need more RB depth. Thoughts?