The bullpen is about to undergo another change.

This one comes from outside the organization.

The Orioles traded Triple-A Norfolk pitcher Garrett Stallings to the Brewers this afternoon for right-handers Thyago Vieira and Aneuris Rodriguez. Vieria hasn’t reported, and the 40-man roster will be full upon his arrival. Rodriguez will head down to the Florida Complex League.

Vieira, 31, had a 5.64 ERA, 1.701 WHIP and one save in 16 appearances with the Brewers. He owns a career 6.18 ERA and 1.667 WHIP in 41 games with the Mariners, White Sox and Brewers, making his major league debut in 2017. He pitched in Japan from 2020-22.

The fastball averaged 98 mph this season and his sinker has plus velocity at 96.9, but he’s averaging 4.9 walks per nine innings in the majors to go with nine strikeouts. He’s averaged 4.5 walks in 10 minor league seasons.

The left field wall can’t keep every baseball in front of it. The Orioles have cleared it a few times in defiance of the new measurements, but there are more denials than dugout celebrations.

Ryan Mountcastle thought he hit a game-tying, two-run homer off Kansas City’s Zack Greinke in the fifth inning of the opening game of today's doubleheader, but umpires held him at second base with a run-scoring double. The Orioles lost the challenge, took the lead, lost it and fell to the Royals 6-4 in Game 1 at Camden Yards.

Rougned Odor was a hero in the seventh with his go-ahead, two-run double, but he committed an error with two outs in the ninth by failing to backhand Nicky Lopez’s grounder, Jorge López threw the ball into right field on a pickoff attempt and Michael A. Taylor singled to left.

A dramatic swing in the game and Odor’s afternoon.

Cionel Pérez allowed back-to-back singles, with Salvador Perez bringing home Taylor with an insurance run.