Finley was Joe's go-to TE up in Green Bay and we know Finley loves him (he loves the thoroughness of preparation). Clay did very well last year and Sims and even Egnew might have further upside with Lazor as OC. However, Joe probably also still yearns for the weapon he previously had, as well. Last year Keller was expected to be the man until the terrible injury in the preseason game against Houston.
Keller is probably going to struggle to fully recover quickly enough, I wouldn't bank on him. Finley has his own health issues with the neck, but if he is fully healthy, this is interesting that it surfaces now before the Draft. More likely to be a B/S leak to feign disinterest in Ebron, Niklas, Amaro, et al.