The Rockies optioned Feltner to Triple-A Albuquerque on Thursday.
Feltner was one of four players on the Rockies' 40-man roster that was dispatched to the minors Thursday, leaving Colorado with 47 players remaining at MLB camp. The 25-year-old right-hander reached the majors for the first time in 2021, making two starts for the Rockies and giving up eight earned runs on nine hits and five walks over 6.1 innings. He's expected to slot into the Albuquerque rotation to begin the upcoming season.