Baltimore optioned Walker to Triple-A Norfolk following Saturday's game against Washington. Walker was called up from Norfolk last Monday and made three appearances for the Orioles, allowing two runs on three hits with a 5:2 K:BB over four innings. He threw 30 pitches Saturday, so Baltimore opted to send him back to the minors in favor of a fresh arm. Righty reliever Cameron Foster was recalled from Triple-A in a corresponding move.
The Orioles selected Walker's contract from Triple-A Norfolk on Monday. Walker has operated out of Norfolk's bullpen this season, where he has a 4.40 ERA, 1.06 WHIP, one save and a 16:5 K:BB across 14.1 innings. His next outing out of the Orioles' bullpen will mark his first major-league game since May 4, 2025 as a member of the Blue Jays. To make room on the roster for Walker, Trey Gibson was optioned to Triple-A and Heston Kjerstad (hamstring) was transferred to the 60-day IL.
The Orioles reassigned Walker to minor-league camp Wednesday, Jacob Calvin Meyer of The Baltimore Sun reports. After being outrighted off the Orioles' 40-man roster in January, Walker always appeared to be a long shot to win a spot in the Opening Day bullpen. He's expected to begin the season at Triple-A Norfolk and will likely need to deliver impressive results before potentially resurfacing in the big leagues.