White Sox general manager Rick Hahn said Thursday that Montgomery (oblique) is now also dealing with a mid-back strain, Scott Merkin of MLB.com reports.
Montgomery was placed on the minor-league injured list before the start of the season due to a strained oblique, and his 2023 debut has been further delayed by this new back issue. Hahn said there's no timeline for when the 21-year-old outfield prospect will begin a rehab assignment with High-A Winston-Salem. Once fully healthy, Montgomery is expected to report to Double-A Birmingham.