Astros set to promote top pitching prospect Spencer Arrighetti

The Astros are promoting pitching prospect Spencer Arrighetti, report Chandler Rome and Ken Rosenthal of the Athletic. The right-hander will make his major league debut tomorrow evening in Kansas City. 

Houston will need to make a corresponding 40-man roster move when they officially select Arrighetti’s contract.

It’s the first major league call for the 24-year-old. Houston selected Arrighetti in the sixth round of the 2021 draft out of the University of Louisiana. While he didn’t enter the professional ranks with much fanfare, he has developed into arguably the top pitching prospect in the Houston system. 

Baseball America and The Athletic’s Keith Law each slotted Arrighetti as the organization’s best minor league pitcher and a top five talent in the system overall.

Both outlets suggest Arrighetti projects as a back-of-the-rotation starter. His fastball sits in the low 90s but plays a bit above its velocity because of its ride at the top of the zone. BA and The Athletic each suggest that Arrighetti’s slider is the best pitch in a generally solid arsenal, while he throws enough strikes to potentially stick in the rotation.

Arrighetti split the 2023 campaign between the top two levels of the minors. He allowed 4.40 earned runs per nine through 124 2/3 innings, striking hitters out at an above-average 27.1% clip. Arrighetti has logged 8 1/3 innings of two-run ball over his first two Triple-A starts this year. He has punched out 10 batters but issued seven walks in the early going.

Houston has been forced to dip its into rotation depth. The Astros knew all offseason they’d be without Lance McCullers Jr. and Luis Garcia deep into the season as they rehab from arm surgeries. Justin Verlander began the year on the shelf after a minor bout of shoulder soreness in spring training, while Jose Urquidy went down with a forearm strain during exhibition play. 

The Astros poked around the rotation market late in the offseason but decided against meeting the asking price for Blake Snell or Jordan Montgomery.

They opened the season with a starting five of Framber Valdez, Cristian Javier, Hunter Brown, J.P. France and Ronel Blanco. Valdez recently felt some soreness in his elbow and landed on the 15-day injured list Tuesday evening. 

Houston called Blair Henley for a spot start in Valdez’s place last night but will give Arrighetti the next look in the rotation. It could be a brief first call, as Verlander is slated for a second rehab start this weekend and could be back in the majors by the end of next week.