I think it is possible he could get into a game on Saturday, but that really should be Mariano Rivera’s day. In Jupiter on Friday, when asked about that possiblity of Jeter DHing on Saturday, Girardi told reporters it is possible.
Girardi on chance Jeter DH's tomorrow: "We’ll see. I’ll see how he feels." (That's Girardi-ese for "Yes. Unless something goes wrong")