Off-season baseball has now just about wound down. The Australian Baseball League (ABL) continues through January 25th, but the other leagues are done.
As for the quality of these off-season leagues, talent levels can vary, but generally range from AA to AAA:
Dominican Winter League - Mid AAA
Puerto Rican Winter League - Mid-Low AAA
Venezuelan Winter League - Low AAA/High AA
Mexican Pacific (Winter) - Low AAA/High AA
Arizona Fall League - Low AAA/High AA
Finally, similar to Spring Training stats, with small sample sizes and varying levels of competition, take all of these with a large grain of salt.
(Note that some players who are no longer in the organization are still listed with the Phillies in MLB's off-season stats, for example J.C. Ramirez, now with Arizona. And I don't know if Tim Kennelly is really back in the org after being released a couple of years ago.)
Highlighting a few:
Dylan Cozens: In the ABL, Cozens has put up a decent line so far (.764 OPS), but with an unsightly BB/K ratio (4.7%/24.4%).
Roman Quinn: Led the AFL in stolen bases with 14 in 24 games (#2 had 10), while compiling a .250/.361/.359 line (.720 OPS). That's not very impressive, but the speed (post-Achilles) and the 14.5% walk rate provided some reason for optimism.
Maikel Franco: .272/.335/.469 for an .805 OPS in the Dominican Winter League, with 7 home runs in 38 games.
Darin Ruf: Also in the DWL, Ruf struggled in limited playing time, .167/.262/.278 (.540 OPS) in 42 PAs. It's safe to say Ruf will be happy to put 2014 behind him and start fresh in spring training:
Minors: .620 OPS (in 131 PA)
Majors: .712 OPS (117)
Winter: .540 OPS (42)
TOTAL: .645 OPS (290)
Sebastian Valle: Valle was the only Phillie in the Mexican league, and hit very well there: .313/.378/.516. If he had enough PAs to qualify, his .893 OPS would have been 3rd best in the league.
Jesmuel Valentin: Valentin, acquired from the Dodgers in the Roberto Hernandez trade, put up a .278/.341/.367 line in the PWL.
Several played in the VWL, with varying degrees of success:
Odubel Herrera: Picked up by the Phils in the Rule 5 draft, Herrera led the VWL in both batting average and OPS, and was second in OBP and SLG.
Aaron Altherr: He didn't have enough PA's to qualify, but his .878 OPS would have been 7th best in the league. He struck out a lot (28.0%), but also walked a fair amount (12.8%).
Freddy Galvis and Cesar Hernandez: Both performed about as expected, with Hernandez (.723 OPS) somewhat better than Galvis (.652).
Adam Morgan: Morgan had a 6.61 ERA in 5 starts in the AFL, but with a .390 BABIP against.
Hector Neris: pitched 18 innings over 20 games in the DWL, and was not scored on.
Nefi Ogando: followed up a strong AFL stint with 5 2/3 scoreless innings in the DWL.
Jesse Biddle: Looking to get back on track after a rough 2014 season, Biddle struggled with command in two starts in Puerto Rico before reporting elbow soreness. It was diagnosed as "mild tendonitis", and an MRI found no structural damage.
Elvis Araujo: The Phillies signed Araujo to a major league deal this off-season, and he did well in the VWL, compiling a 1.27 ERA in 21 1/3 innings in relief.