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Stars & Scrubs is not about having bad players. "Scrubs" just means cheap, not awful. So Russ Branyan counts as a "scrub" even though he's the M's best hitter. A talented pre-arb player is also a "scrub", even if he's Albert Pujols or ARod and one of the best players in the game at 21.
The point of the philosophy is to focus your economic resources on getting the very best players you can and then filling out the rest of your roster with value picks. You want those value picks to perform like stars, but for these puposes they aren't considered to be "Stars" until they are paid like stars.