Prospect Potent Potables - 8/11

• Jordan Lyles is slated to make his Triple-A debut tonight, but as Bryan Smith of FanGraphs.com argues, this should be his last promotion for the season.  Meanwhile, J.D. Martinez has been a nice surprise for the Astros after they selected the OF in the 20th round in 2009, and he continues to succeed in his first test against advanced pitching, batting .326/.404/.489 in 92 AB's in Double-A, reports Zachary Levine of the Houston Chronicle.
• The Braves have demoted OF prospect Cody Johnson back to High-A after 233 AB's and a .613 OPS in Double-A, reports TalkingChop.com.
• The Mariners are having a disappointing season at the major league level, but they have seen some positive performances at the lower levels of the minors from Latin American players like George Mieses, Richard Vargas, and Ramon Morla, says Conor Glassey of Baseball America (subscription required).
• Tim Alderson still has a long road ahead of him in trying to work out his mechanical flaws before the Pirates can even consider him as a part of their future, says Dejan Kovacevic for Baseball America.  Meanwhile, Tim WIlliams of PiratesProspects.com asks whether or not Chase D'Arnaud is the team's shortstop of the future.
• Vance Worley may have been sent down by the Phillies, but he was only sent to Triple-A rather than back to Double-A where he was promoted from, so the final result felt like a promotion, says Jim Salisbury for Baseball America.
• Ray Parrillo of the Philadelphia Inquirer breaks down the long journey of Angels' prospect Mike Trout, from South Jersey high school star to top prospect in all of baseball.