MLB's best and worst farm systems

Baseball America ranks the 30 MLB farm systems twice a year -- in the spring, as the minor league season is about to start, and again every December in our Prospect Handbook

It's a collaborative effort, and staff members don't always agree on what constitutes a strong system. Is depth what matters, or is it better to have a small group of players who become big league regulars and perhaps one or two stars?

For the personal ranking presented here, the emphasis is on star power. That's why the Texas Rangers, who were No. 1 in BA's rankings last year, remain on top even after graduating such talents as Elvis Andrus, Taylor Teagarden, Julio Borbon, Derek Holland and Tommy Hunter to the major leagues.

Right-hander Neftali Feliz is still considered a prospect; he retains rookie eligibility after having thrown just 31 innings in 20 appearances with Texas. He leads the way for a Rangers system still bursting with impact talent, though not as much as it had last year. Texas' system is still good enough for No. 1, as it appears that overall minor league talent has hit a bit of a down cycle.

1. Rangers: Feliz has a special arm and could still be an impact starting pitcher, but if he's not, he has already shown the ability to be a shutdown reliever. The Rangers' pitching depth remains impressive, as lefty Martin Perez earned top prospect honors in the low Class A South Atlantic League in his first full season. Texas' top signed draft pick, right-hander Tanner Scheppers, showed premium stuff in the Arizona Fall League, and the system has power lefties in Kasey Kiker and Robbie Ross. Texas lacks depth in terms of hitters, but switch-hitting first baseman Justin Smoak isn't far away from being able to help a lineup that needs it.

2. Rays: Talk about top-heavy. Every system would love to have two big league-ready right-handers like Wade Davis and Jeremy Hellickson, who both have stuff, command and success at the upper levels. And neither of them is even the Rays' top prospect -- that honor goes to five-tool center fielder Desmond Jennings, whose only issue is durability. In between Triple-A and low Class A, the Rays are a bit thin, but they have a bevy of power arms at the lower levels, led by left-hander Matt Moore

3. Giants: San Francisco has two elite talents in catcher Buster Posey and left-hander Madison Bumgarner, both of whom should contribute to the major league club in 2010. The Giants also have depth, despite the uncertain status of slugger Angel Villalona, who was stripped of his U.S. visa after an off-season murder charge in his native Dominican Republic. San Francisco has shortstop options, some solid bats (such as outfielder Thomas Neal) and solid depth, but it's really about the stars.

4. Phillies: Philadelphia had the depth to trade for Cliff Lee and still have a top-flight farm system. Outfielder Michael Taylor has hit .333 over the last two seasons, rocketing to Triple-A, and fellow outfielder Dominic Brown has better tools, though he's still a bit raw. Righty Kyle Drabek, son of the former Cy Young Award winner Doug Drabek, has three above-average pitches to go with excellent athletic ability. Beyond their Big Three -- all of whom have performed at Double-A or above -- the Phillies are bursting with young power arms, toolsy Latin American infielders and athletic outfielders, such as Anthony Gose

5. Indians: Cleveland has traded many of the key players from its 2007 playoff team. That's cold comfort to Tribe fans, but many of the prospects acquired in those trades now give the Indians one of the game's top farm systems. The organization's top arms, right-hander Jason Knapp and left-hander Nick Hagadone, both were trade pickups, with Knapp coming from the Phillies in the Cliff Lee deal and Hagadone from Boston as the key piece in the Victor Martinez trade. Catcher Carlos Santana, acquired from the Dodgers for Casey Blake, is a switch-hitting offensive force who was the MVP of the Eastern League in 2009, and 2008 first-round pick Lonnie Chisenhall reached Double-A in his first full pro season.

26. Nationals: They have the best prospect in the game in No. 1 draft pick Stephen Strasburg, plus solid talents in catcher Derek Norris, right-hander Drew Storen and shortstop Danny Espinosa. Beyond that, though, the Nats have very little help, especially at the upper levels, which is a pity considering the state of the big-league roster.