Orioles president of baseball operations Mike Elias said Wednesday that Eflin (back) will be a full participant as spring training gets underway, Roch Kubatko of MASNSports.com reports.

Eflin missed the final two months of 2025 due to a back injury that he addressed with lumbar microdiscectomy surgery Aug. 18, but he was cleared to resume throwing off a mound in early January. Baltimore re-signed the veteran righty on a one-year, $10 million deal in October, so Eflin should be ticketed for a back-end rotation spot.

Orioles president of baseball operations Mike Elias said Wednesday that Selby is expected to begin the season on the injured list due to right shoulder inflammation, Matt Weyrich of The Baltimore Sun reports.

He's not dealing with any structural damage, but Selby will be sidelined indefinitely as the Orioles allow the inflammation in his shoulder to subside. Selby yielded five runs with a 14:2 K:BB over 14 frames with Baltimore in 2025 and, once healthy, is slated for a middle relief role.

Orioles president of baseball operations Mike Elias confirmed Wednesday that McDermott (back) will prepare in spring training to handle a relief role during the 2026 season, Andy Kostka of TheBaltimoreBanner.com reports.

McDermott made a spot start for the Orioles in his 2024 big-league debut, but after battling a shoulder injury to close out that season and then a lat strain to begin the 2025 campaign, he struggled to find his form. The right-hander then sustained a minor elbow issue in July and ended up shifting to a relief role over the final two months of the season between the majors and Triple-A Norfolk. McDermott was placed on the injured list Sept. 23 due to back discomfort, but he appears to have had a healthy offseason. With the Orioles' starting candidates in generally good health entering 2026, McDermott isn't needed as rotation depth will have to make his mark out of the bullpen during the spring in order to secure a spot on the Opening Day roster.

Mayo has been working out at third base early in Orioles camp and could see playing time at the position if Jordan Westburg (oblique) shifts to second base to cover for Jackson Holliday's (hand) expected absence to begin the season, Matt Weyrich of The Baltimore Sun reports.

Mayo didn't see any action at third base with the big club from June on last season, focusing on first base and designated hitter instead. However, with Holliday slated to begin the season on the injured list and with offseason pickup Pete Alonso locked in as the Orioles' everyday first baseman, Mayo is being reconsidered as an option at the hot corner. The likelier scenario seems to be Blaze Alexander picking up Holliday's reps, but Mayo could change minds with a strong Grapefruit League showing.

Orioles president of baseball operations Mike Elias said Wednesday that Wells will be built up as a starting pitcher during spring training, Andy Kostka of TheBaltimoreBanner.com reports.

According to Jacob Calvin Meyer of The Baltimore Sun, Elias said that the Orioles haven't made a firm determination what role Wells will handle over the long haul, but at least to begin camp, the 31-year-old righty will be in the mix for a rotation spot. After completing his recovery from June 2024 UCL revision and internal brace augmentation surgery on his elbow, Wells was activated from the injured list last September and pitched well over the final month of the season, logging a 2.91 ERA, 0.88 WHIP and 18:2 K:BB in 21.2 innings over his four starts.

Carroll suffered a broken hamate bone in his right hand during a live batting practice session Tuesday and is slated to undergo surgery Wednesday, Steve Gilbert of MLB.com reports.

The Diamondbacks likely won't provide a recovery timeline for Carroll until surgery is completed, but the procedure on his non-dominant hand will cost him significant time this spring and prevent him from competing for the United States in the World Baseball Classic. The 25-year-old outfielder's availability for the Diamondbacks' March 26 season opener versus the Dodgers is also firmly in question.

Orioles president of baseball operations Mike Elias said Wednesday that Alexander is a candidate to start at second base while Jackson Holliday (hand) is out, Matt Weyrich of The Baltimore Sun reports.

The Orioles acquired Alexander via trade Feb. 5, and the next day Holliday suffered a hamate bone fracture that will result in a stint on the injured list to begin the season. Alexander slashed .230/.323/.383 with seven homers and four steals over 74 games for the Diamondbacks in 2025. Jordan Westburg (oblique) will also be in the mix for reps at second base while Holliday is shelved.

Westburg could miss the first few Grapefruit League games after suffering a strained right oblique in late January, Roch Kubatko of MASNSports.com reports.

Oblique injuries have a tendency to linger, so the Orioles will proceed cautiously with the infielder so he doesn't suffer a setback. Westburg is projected to be the team's everyday third baseman this season, though he could fill in at second base while Jackson Holliday (hand) is sidelined to begin the campaign.

Diaz was added to the Mariners' spring training roster as a non-roster invitee.

Diaz was designated for assignment and outrighted to Triple-A in January, when the Mariners acquired Cooper Criswell. The left-hander will likely be a depth option for Seattle's bullpen this season, although he isn't guaranteed a spot on the Opening Day roster. He made just one big-league appearance in 2025.

Holliday will undergo surgery Thursday for a fractured right hamate bone and will begin the season on the injured list, Roch Kubatko of MASNSports.com reports.

A clearer timetable should become available after the operation, but Holliday will shelved for several weeks in any case. Additionally, it's a procedure that can often result in an initial loss of power for a player upon their return. Blaze Alexander and Jordan Westburg (oblique) are candidates to handle second base while Holliday is out.