Will Jay be used (mostly) as a third down back?
How would any of us possess that information?
No, I think he will platoon with Miller. They will likely alternate series, but I could see Ajayi being the 3rd down, short yardage and 4th quarter run out the clock back.. His playing time will primarily come down to ball security. If he holds onto the ball well, he has the pass pro, short yardage, and receiving skills to do what Knowshown Moreno did in our offense during his brief appearance. He will not be a bell cow back, because we want coverage for his knee issue. But, he has a chance to take the bulk of the meaningful carries.
here's Jay on WQAM with Kelly
http://miami.cbslocal.com/audio/joe-rose-show/
One thing i liked was when he was asked what vets he's is learning the most from he mentioned Jennings. Man i'm glad he's here to help the younger guys and maybe even catch a few passes. Jay sounds ready to prove all the people wrong that are concerned about his knee.