Back in November, Baseball America published its list of the Astros top prospects for 2015. The list was, predictably, headed up by Carlos Correa, but also contained five pitchers.
Mark Appel was ranked as the Astros second best prospect, with Vince Velasquez fourth, Michael Feliz fifth and Josh Hader tenth. Third-best prospect Mike Foltynewicz was soon afterwards traded to Atlanta. Velasquez remains at Corpus Christi and Feliz and Hader are both in Single-A. None of the three are likely to receive a call-up this season, but recent roster activity has suggested that, for the Astros at least, the future could be now.