A couple of Astros' mentions in this week's Hot Sheet:
17. Trent Thornton, RHP, Astros
"The Astros do an excellent job developing their minor league pitchers and Thornton, a durable, reliable back-of-the-rotation starting candidate is one of the examples. It’s hard to see where he fits into the Astros stacked rotation this year, but Houston has a pair of starting pitchers hitting free agency after this season (Charlie Morton and Dallas Keuchel) so there may be a spot for Thornton to compete for in 2019."
HELIUM
Patrick Sandoval, LHP, Astros
"His fastball ranges from 88-94 mph, and his changeup is an advanced offering that draws swings and misses and earns plus grades from evaluators. He also has a big mid-70s curveball that’s above-average when he nails it, and a short and tight slider in the low 80s that also flashes average to above-average potential. With an out-pitch changeup, two potential above-average breaking balls and a fastball he can ramp up and down, Sandoval has put himself on the prospect map with both his stuff and his streak."
https://www.baseballamerica.com/stories/top-mlb-prospects-hot-sheet-72318/