Who should I start: Ajayi, Mixon, Aaron Jones, or Morris?

I’m in a PPR league and I’m wondering who I should start as my RB2;

Jay Ajayi (VS DEN)
Joe Mixon (VS JAX)
Aaron Jones (VS DET)
Alfred Morris ( VS KC)

I’m leaning towards Ajayi but I’m worried about his workload now that he’s with the Eagles.

What are your guy’s thoughts?