Orioles to Call Up Kjerstad, De León (No. 7 Prospect) in September Expansion

Baltimore is set to add outfielder Heston Kjerstad and left-hander De León to the active roster as part of September expansion, per sources cited by Jake Rill of MLB.com. Neither move has been announced by the club.

De León carries the higher prospect pedigree — he ranks as the Orioles' No. 7 prospect — making his arrival one worth tracking beyond the calendar context. Kjerstad, a former top pick who has taken a winding path through the organization, gets another look at the big-league level as the roster widens.

What remains unconfirmed

The timing of the official transactions, roster construction details, and any corresponding moves to accommodate the additions have not been reported. Sources indicate the callups are coming; the club has not announced them.

The broader picture

Baltimore has been unusually active at the roster level in recent days. The Orioles claimed outfielder Luis Robert Jr. off waivers from the Mets and called up Cade Povich to manage rotation workload — so Kjerstad and De León arrive into an outfield and pitching staff already in flux. How all of these pieces fit together operationally is still taking shape.