The Astros have suspended left-hander Reymin Guduan for what GM Jeff Luhnow described as a “disciplinary issue” at Triple-A, the Houston Chronicle’s Chandler Rome writes. Guduan will be suspended for the rest of the season. Specifics aren’t known about what caused the punishment, as Luhnow only said that Guduan “broke our team rules and is being disciplined because of it.”

Guduan has appeared in 32 games for the Astros over the last three seasons, with just 24 2/3 innings amassed over that limited big league action. The hard-throwing southpaw has an 8.03 ERA as a Major Leaguer, including an 11.81 mark in only 5 1/3 frames this season. Even in the minors, Guduan hasn’t exhibited much consistency — a 4.64 ERA over 382 career innings in Houston’s farm system, with an 11.1 K/9 that has been undermined by a 6.2 BB/9. Between this lack of a track record and now a lengthy suspension, it’s fair to wonder if this could mark the end of Guduan’s time with the Astros organization.

Though Guduan wasn’t likely to be much of a factor for the Astros down the stretch this season, though his absence does remove some depth in an area that was already something of a thin area for the team. As Rome notes, Wade Miley, Framber Valdez, and Cionel Perez are the only left-handers on Houston’s entire 40-man roster. Of that trio, Miley is a starter, Valdez and Perez are in the minors, and Perez is additionally on the injured list. While the Astros haven’t much sweated their lack of left-handed relievers over the last couple of years, the lack of an August waiver trade period this season would make it all the more difficult for the team to acquire another pitcher if it felt another lefty arm was needed.