Chandler Rome

The 2017 first-rounder is learning to elevate his four-seamer this season, and early struggles were a part of the learning process.

The Astros signed Barber, their fourth-round pick, for a reported $1 million, nearly $600,000 above slot value.

A post-Tommy John surgery velocity boost had helped push Urquidy toward the top of the Astros’ depth chart.

A 26th-round pick in 2017, Rojas started at least nine games at six different positions last season for Double-A Corpus Christi.

Signed at age 22, Torres already has premium velocity and feel for two strong secondary pitches, meaning he is poised to move quickly.

Establishing himself as a serviceable defender at either first base or left field tops Alvarez’s to-do list this season in the minors.

An 11th-round pick by the Astros in 2017, the 22-year-old Bielak recently received an invitation to his first major league spring training.

Perez made his major league debut as a reliever in 2018, but the Astros aren’t shutting the door on his future as a starter.

The Astros are confident about heading into 2019 with three big league catchers, a group that includes the prospect Stubbs.

Astros coach guided a dominant staff.

A true power-speed threat, Fisher has been undermined by a low contact rate in the major leagues.

Steady refinement in pro ball has made the 2016 second-rounder a threat at the plate, on the bases and in center field.

The outfielder took a spring-training pep talk to heart and focused his attention on excelling in one area that could help the big league team.

The 34th-round pick credits offseason surgery for a velocity surge that helped him overpower Triple-A hitters.

The 2018 first-rounder seamlessly carried his trademark hitting approach from the ACC to pro ball by showing ample power and patience.

The phenom continues to produce amid sky-high expectations, making him an easy choice as the system’s Best Player in our midseason update.

The righthander relied on a pair of quality breaking balls to became the second 2017 draft pick to reach Double-A.

A 19th-round pick in 2015, Ferguson played his way to Triple-A, where he could offer contrasting skills to the Astros.

The sweet-swinging Tucker impressed the Astros in big league camp with his production—and sense of humor.