Yabbut, still a rookie. I don't think the all-rookie lineup is coming any time soon, though. They might have been able to field one if they hadn't traded off so much ripe talent at the deadline and the off-season, though.
The odd thing is that while it was a rookie-driving-in-a-rookie game-winning RBI, Ewing contributed close to nothing. He struck out looking to end the ninth, was gifted second base by a stupid rule to open the tenth, and scored standing up on a play that would have scored virtually anybody.