If it's Adam Jones of the Orioles, grab him. If A. Jones is Andruw Jones, then never mind. :)
Upton is worth a gamble right now, providing you have a decent outfield. The young and talented Upton's ceiling is sky high.
If you could use Teahen's multi-position eligibility, then consider this: he was a breakout candidate a couple of seasons ago that never took the next step. This could be a big year for this potential post-hype sleeper.