It seems like only yesterday some in the baseball world were ridiculing the Astros’ piggyback and tandem pitching rotation in the minors, celebrating further when the team abandoned the concept relatively early in the season. Jeff Luhnow and his whiz kids were trying to prove they were smarter than the rest of baseball, the cynics decried. The Astros abandoned the tandem rotation but moved to six-man rotations on most farm teams, accomplishing the primary goal of keeping the young arms healthy. Now Luhnow can celebrate a successful and relatively healthy season for the Astros’ top pitching prospects, from Vincent Velasquez at Class A Lexington and Lance McCullers at Class A [...]