You'd think the Cubs would keep their stats up to date on the MLB website, but nooooo!
JR was correct in that Fukudome made his MLB debut with three hits, going 3-3 in an extra-inning loss to the Brewers, including a game-tying 3-run homer off of Eric Gagne.
The answer I was looking for though was Doug Dascenzo, whose MLB debut was on September 2, 1988 against the Reds. Dascenzo went 3-5 that day scoring 2 runs in the 6-5 loss.