The Orioles have moved right-hander Trey Gibson from the taxi squad to the active roster for tonight’s series finale against the Rays.

Left-handed reliever Nick Raquet was optioned after one day to make room for Gibson, who’s set to make his third major league appearance and second start.

MLB Pipeline ranks Gibson as the No. 4 prospect in the system. He allowed three runs in 4 2/3 innings in his debut at Yankee Stadium on May 3 and one run in two relief innings against the Athletics.

Gibson, the organization’s Minor League Pitcher of the Year in 2025, has registered a 3.69 ERA and 1.674 WHIP in eight starts with Triple-A Norfolk. His last appearance was seven days ago.

The Orioles have won four of their last five games and will go for the sweep tonight.

The rotation’s ERA has improved to 4.87, 28th in the majors. The Orioles have moved ahead of the Astros (4.90).

Shane Baz allowed one run in seven innings last night after Kyle Bradish held the Rays to one run in six. Baz has a 2.25 ERA in his last three starts. Bradish’s ERA is 1.56 in that same stretch.

Brandon Young, in the rotation due to injuries, has posted a 3.47 ERA in seven starts, and he’s allowed only four earned runs in his last three appearances over 15 2/3 innings.

“I think they’re getting into a groove,” manager Craig Albernaz said of the rotation. “I think they’re in a good cadence of their work and their process, as far as in between starts, making little tweaks that they need to, whether that be delivery or pitch usage. And also with the starting pitching group, they’re a tight-knit group and they also like to talk crap and compete, too. So that competitive nature kind of filters over to the game.

“I’m not saying they want to one-up (each other), but when you see KB go out there and do what he does, then now it’s time for Baz to kind of step and do it. It’s been fun to watch.”

Asked about Baz after last night’s game, catcher Samuel Basallo said via interpreter Brandon Quinones, “Shane is a tremendous pitcher. We see that all his pitches work really well. Obviously, he didn’t get off to the start that we wanted him to early in the season, but sometimes from those bad outings you learn a lot as well. So hopefully, I think what we’re seeing is that Shane learned from those bad outings and I think right now we’re seeing the pitcher that we all know Shane can be and hopefully he’ll keep that going.”

Tampa Bay left-hander Steven Matz has a 3.70 ERA in eight starts. He came off the injured list to face the Orioles last week at Tropicana Field and allowed one run in four innings.

Matz owns a 3.76 ERA in 10 career games (six starts) against the Orioles. Pete Alonso is 3-for-8 with a home run.

The Rays have lost three in a row for the third time this season. They need to tighten up a defense that’s committed seven errors in two games and 39 this season, second most in the majors.

“We’re human. We’re gonna make errors,” Richie Palacios told the media after he botched a double play grounder.

“Don’t try to overcompensate. … Just continue to play the game. We’ll be all right.”

Tampa Bay already has lost its first series since April 20-22.

Note: According to the transactions page, the Orioles signed shortstop Mason Dinesen, 27, to a minor league contract and assigned him to the Florida Complex League.

Dinesen played independent ball in 2022-25,  but also appeared in 79 games in the White Sox system in 2024-25. He hit .240/.272/.342 in the minors and also tossed 4 2/3 scoreless and hitless innings with one walk and six strikeouts.

Tread Athletics posted on Instagram that Dinesen converted to pitcher and his fastball is up to 97 mph after only two months at the facility.