Yasiel Puig is the big name but keep an eye on Chris Withrow as a potential bullpen arm who could be in the majors by the end of the season. Watch Puig's plate discipline (not just walks, but his BB/K ratio) to see how ready he is for the majors.
Colorado Springs (COL)
Just like in the majors, it's all about offense in the Rockies Triple-A affiliate, with Nolan Arenado pushing Ryan Wheeler over to first base. Arenado was beat out in spring training by Chris Nelson, but if he returns to his 2011 form, he should force his way to the majors by mid-season, no matter what Nelson is doing.
Gary Brown could be up for a big offensive season, much like he had in the offensively similar California League in 2011. The center fielder struggled last season as Richmond and has one last chance to prove that he's an everyday player and not a fourth outfielder. Left-hander Mike Kickham leads the pitching staff after a strong season in Richmond in 2012. He skipped the Cal League on his way through the Giants system, so this will be his first test in an extreme hittter's environment.
Brett Jackson and Josh Vitters are the names everyone knows and this is their final chance in the minors to prove they should be a part of the Cubs rebuilding process. Both should be in the majors at some point this season, but both need to give the Cubs some reason to believe they can be regular players at the next level.
Las Vegas (NYM)
The new Mets affiliate are headlined by pitching phenom Zack Wheeler, who won't be in the desert for too long. He should be in the majors by June. The 51's also feature Travis d'Arnaud and Wilmer Flores, giving them the best collection of top prospects in the PCL.
Oscar Taveras will be the best player in the PCL and will only be there as long as the Cardinals still have him blocked in the majors. 2012 first-rounder Michael Wacha could be close behind him, and should be the PCL's best pitcher once Wheeler joins the Mets.
The Brewers system isn't deep, but Johnny Hellweg, who came over in last summer's Zack Greinke trade, is a flame thrower and almost made the Brewers bullpen out of spring training. He'll work as a starter in the minors.
New Orleans (MIA)
The Zephyrs thought they were getting Jose Fernandez at some point this season, but instead will have to settle for Jacob Turner and Kyle Skipworth, which is not a close consolation prize. Christian Yelich will join them eventually, but not yet.
Oklahoma City (HOU)
Jarred Cosart, Rudy Owens and Paul Clemens highlight a rotation of prospects the Astros have acquired over the past two seasons, while the lineup is led by Robbie Grossman, Marc Krauss and Jonathan Villar. None of these players were drafted by the Astros, a testament to their rebuilding process, but none are high-end prospects.
Round Rock (TEX)
The headliner is Jurickson Profar, but he'll be flanked by Mike Olt in the lineup and Justin Grimm on the mound. Profar could also be spending the majority of his time at second base now that the Rangers have locked Elvis Andrus up long term.
Sonny Gray and Grant Green give the RIver Cats a pair of first rounders still trying to gain some traction within the A's organization. Either could move quick if they have success or they could spend the whole season in the PCL.
Salt Lake (LAA)
The least prospect-laden team in the PCL offers Kole Calhoun in the outfield, but even he could be in the majors soon.
There are prospects galore on the Rainers roster, including Danny Hultzen and Erasmo Ramirez in the rotation and Nick Franklin in the middle infield. Taijuan Walker and Mike Zunino should both be there at some point as well.