While that's not the kind of power that you'd like to see from a corner outfielder, there's nothing wrong with a .281/.344/.402 line.
That's assuming Stewart stays healthy, of course. Considering that he's spent his entire career on carpet in the Sky Dome Rogers Centre and Metrodome, and that his major problem has been with his legs and feet... I've got to think that he'll hold up better on real grass on Oakland.
If he can earn the playing time amongst the other dozen outfielders on the roster, that is. With the likes of Bobby Kielty, Ricky Ledee, Ryan Goleski, Hiram Bocachica, Charles Thomas, Javier Herrerra, Travis Buck and whoever else Billy Beane signs in the next two weeks, Stewart will have plenty of company in the outfield this March.