Here's an early, early look at the 2010 affiliate rosters. It's tough to tell which guys will be let go or signed as minor-league free agents at this point, so I've only included prospects and fringe-prospects, meaning some positions aren't listed.
Catcher: John Jaso or Jose Lobaton - Both are on the 40-man roster, but neither figures to make Tampa Bay's roster.
Second base: Elliot Johnson
Shortstop: Reid Brignac - Rays will probably look to move either Brignac or Bartlett in the off-season.
Left Field: Justin Ruggiano
Centerfield: Desmond Jennings - If he hits as well as he did in 2009, he won't be in Durham for long.
Pitchers: Jeremy Hellickson and Heath Rollins
Notable absences: Sean Rodriguez, Matt Joyce, and Wade Davis all have inside tracks toward major-league jobs, while Mitch Talbot is out of options.
Catcher: Nevin Ashley
Corner infield: Matt Sweeney
Middle infield: Shawn O'Malley - He's seen time at both SS and 2B in the Arizona Fall League, could play both in 2010 with the Biscuits.
Utility: Cody Cipriano - Ended the 2009 season in Montgomery; has worked as an infielder and outfielder.
Pitchers: Jake McGee, David Newmann, Alex Cobb, Alex Torres, Aneury Rodriguez, and Matt Gorgen
Charlotte Stone Crabs
Catcher: Jake Jefferies
First Base: Mike Sheridan - Tough 2009 season, but should get the promotion.
Shortstop: Tim Beckham - The next step up.
Outfield: Kyeong Kang - Finished the 2009 season very strongly; a big 2010 would establish himself as a real prospect.
Pitchers: Matt Moore, Nick Barnese, Joseph Cruz, Shane Dyer, Chris Andujar, Marquis Fleming
Bowling Green Hot Rods
Shortstop: Tyler Bortnick
Outfield: Brett Nommensen and Chris Murrill
Pitchers: Kyle Lobstein, Alex Colome, Jason McEachern, Zach Quate, Scott Shuman
As you can tell, it gets murkier the lower down you go. Projecting the short-seasons would be nearly impossible, as much of that depends on how players perform in extended spring training. Durham looks to be a relatively unexciting team prospect-wise outside of Desmond Jennings and Jeremy Hellickson, but the complement of veteran players should make for another relatively successful season. Jennings and Hellickson are on track for major-league roles by the end of the season, so the Durham roster could be pretty barren late in the year.
Montgomery really lacked in the prospect department when Jennings and Hellickson were promoted to Durham, but they should inherit much of the Charlotte Stone Crabs' 2009 pitching staff that got the Crabs within a game of winning the Florida State title. Jake McGee could skip over Montgomery and slide into Durham's bullpen with a strong spring. Even without McGee, the pitching of Alex Cobb, Alex Torres, David Newmann, and Aneury Rodriguez along with Matt Gorgen and Marquis Fleming in the bullpen should be strong. Rodriguez would be first in line for a promotion to Durham if he pitches well.
The Stone Crabs should have plenty in terms of "name" prospects, but that didn't necessarily equate to wins with Bowling Green last season. Matt Moore will headline the rotation while Nick Barnese will look to stay healthy for the season. Tim Beckham has a chance to quiet some of the critics, while Kyeong Kang could be primed for a breakout season.
Bowling Green should have a strong starting rotation for the second straight year. Kyle Lobstein and Alex Colome will certainly make the jump to full-season ball, but it remains to be seen how cautious the Rays will be with him. Unfortunately for the Hot Rods, they don't look to have the same caliber of hitting prospects that they had in 2009 with Beckham, Kang, etc. Zach Quate and Scott Shuman each had strong seasons of the bullpen in short-season ball in 2009. Quate could follow in Gorgen's footsteps and be skipped over low-A, while the reports on Shuman are positive enough that he could make the leap from Princeton to Bowling Green.
Projecting rosters is a wholly inexact science. If there's any players in particular you'd like to go more in-depth about, don't hesitate to leave a comment.