The Astros optioned Dubin to their minor-league camp Thursday, Brian McTaggart of MLB.com reports.
Dubin is expected to return to Triple-A Sugar Land to begin the 2022 campaign after he turned in a 3.44 ERA, 1.10 WHIP and 69:19 K:BB in 49.2 innings with the affiliate a season ago. After being added to the 40-man roster over the offseason, Dubin should be on the shortlist for a call-up to the big club if the Astros have a need for a spot starter or multi-inning reliever.