Arguably since the time of Billy Wagner, the Astros have not had a truly dominant left-handed reliever. In the ALCS, we witnessed how good Jackie Bradley Jr. and Rafael Devers did against our bullpen and I think we were one reliever away from going back to the World Series. The Astros have many options if they look to promote someone from within, sign a free agent, or trade for a big time player.
Perez was primarily used as a starter in the minors, but made some relief appearances for the Astros last season.