Targeting Mixon - Trade Offer

I like Mixon’s potential with the new offensive coordinator and want to get him wherever possible. I’m struggling in one league with Demarco Murray and could use another RB. The league is PPR

My current roster is…
RB: Murray, Hunt, Powell, Abdullah
WR: Michael Thomas, Allen, Diggs, Moncrief, J. Brown, Higgins, Wright

I’ve been offered Diggs for Mixon. With Diggs’ uncertain QB situation I’ve actually been considering it. Would that be too much?

Any thoughts?