The Orioles recalled Walker from Triple-A Norfolk on Monday.
Walker has appeared in three games out of the Orioles' bullpen this season but has spent most of 2026 in Triple-A, where he has a 4.28 ERA, 1.11 WHIP, one save and a 32:9 K:BB across 27.1 innings. The move corresponds with the Orioles placing Keegan Akin (elbow) on the 15-day injured list.