A Lesson in Minor League Pitchers, Over-Simplified

If you know how to throw at least one good pitch... you're in Rookie ball or Extended Spring Training.
If you know how to throw at least one good pitch AND you know where it's going... you're in Single-A.
If you know how to throw at least two good pitches AND you know where only one of those pitches is going... you're in High-A.
If you know how to throw at least one or two great pitches and one good pitch AND you know where only one of those pitches is going... you're in Double-A.
If you know how to throw at least one or two great pitches and one good pitch AND you know where those pitches are going... you're in the Majors.
It's true. A pitcher who can command great stuff is only stuck in Triple-A if his Major League team is stalling to save money later on (Washington, Strasburg) or has no open spots in their starting rotation (Tampa Bay, Hellickson).
Triple-A is the placeholder league -- and that's why it's great to see the Blue Jays' Triple-A hitters (I'm looking at you, Brett Wallace) mashing the ball on their way to upcoming promotion.