The 2013 Arizona Fall League (AFL) schedule has been released, and rosters should be announced later this month
There are three AFL games scheduled every day Monday through Saturday (there are no games on Sunday), beginning with AFL Opening Day on Tuesday October 8th and extending up through Thursday November 14th. The AFL Rising Stars Game will take place at Surprise Stadium Saturday night November 2nd (there are no league games scheduled that day), and the AFL Championship game will be played at Scottsdale Stadium on Saturday November 16th.
The Cubs usually assign some of their better prospects to the AFL. Depending on what positions the Cubs are asked to fill on the Mesa squad, I would not be surprised to see some combination of position players like SS Javier Baez (who played in the AFL last year), RF Jorge Soler (if healthy), 2B Arismendy Alcantara (if he doesn't play in the Dominican Winter League), 3B Kris Bryant, Mike Olt (if Bryant isn't assigned to the AFL), or Christian Villanueva (if he doesn't play in the Mexican Pacific League and if Bryant or Olt aren't assigned to the AFL), CF Matt Szczur, Jae-Hoon Ha, or Albert Almora (Szczur played in the AFL last year), 1B Dustin Geiger or Dan Vogelbach, and/or Rafael Lopez (if the Cubs are asked to supply a catcher), and (if they have not exceeded their max proscribed IP) a AA starting pitcher like LHP Eric Jokisch or RHP Matt Loosen, and relievers like LHP Zac Rosscup and Kyler Burke and RHP Trey McNutt, and Tony Zych (McNutt and Zych have pitched in the AFL before).
Alcantara is a lock to get added to the Cubs MLB 40-man roster post-2013, but Rosscup, Ha, Loosen, and Burke might have to prove themselves in the AFL first. (Rosscup, Ha, and Loosen are Rule 5 eligible post-2013, and Burke can be a minor league FA if he isn't added to the 40-man roster by the 5th day following the conclusion of the World Series).
They have changed a bit over the years, but here are the current AFL eligibility rules: