MLB Player News

Castillo is slated to piggyback starting pitcher Bryce Miller during Tuesday's game against the White Sox, Adam Jude of The Seattle Times reports.

Castillo will be making the first relief appearance of his MLB career Tuesday after going 1-4 with a 6.34 ERA and 1.57 WHIP through his first nine starts of the season. Since Miller covered 5.1 innings in his 2026 Mariners debut last week in Houston following his return from the injured list, manager Dan Wilson is likely to let Miller work as long as he's effective against the White Sox. With that in mind, Castillo's innings projection for Tuesday is highly variable, and how he and Miller both perform could determine how Seattle sets up its rotation moving forward. If Miller comes through with a strong outing Tuesday, he'll likely draw another start the next time the fifth spot in the rotation comes up, while Castillo could be thrust into a more flexible bullpen role on a longer-term basis.

Glasnow (back) has not yet resumed throwing off a mound after his back flared up, Sonja Chen of MLB.com reports.

Glasnow had been given the green light to play catch, but he's still experiencing back discomfort, which is why he hasn't returned to throwing off a mound. He'll presumably need to throw off flat ground without issue before advancing to mound work, at which point a timetable for his return could start to come into focus. Chen notes that Glasnow has been temporarily shut down from throwing for the time being.

Webb (knee) will make a rehab start later in the week, Alex Pavlovic of NBC Sports Bay Area reports.

Webb hit the 15-day injured list May 9 due to right knee bursitis, but he continues to trend in the right direction. Assuming his rehab appearance goes as planned later this week, he should be ready to be activated from the IL shortly after, per Pavlovic.

Woodruff (shoulder) is tentatively scheduled to face hitters Friday, Adam McCalvy of MLB.com reports.

Woodruff simulated two innings in a 30-pitch bullpen session Monday and came out of it well. If he is able to take another step forward when he faces hitters Friday, Woodruff could soon be cleared to make a rehab start. There's no timetable yet for the veteran hurler's return to the Brewers' rotation, but early June is plausible. Woodruff has been sidelined since late April with right shoulder inflammation.

Castano was optioned to Triple-A Albuquerque on Monday, Patrick Saunders of The Denver Post reports.

Castano was brought up to the big leagues Sunday and allowed one run on two hits and one walk while striking out three over 2.1 frames against the Diamondbacks. He'll return to Triple-A where he'll serve as organizational bullpen depth.

Matz (elbow) will return from the 15-day injured list to start Wednesday's game against the Orioles, Marc Topkin of the Tampa Bay Times reports.

Matz came out of a bullpen session Sunday with no concerns, clearing the path for his return. The veteran southpaw didn't make any rehab starts while he was on the shelf, but since he was on the IL for the minimum amount of time, he may have only a light workload restriction in his return to action Wednesday. Matz posted a 3.86 ERA, 1.10 WHIP and 28:13 K:BB over 37.1 innings covering his first seven starts for the Rays before going down with left elbow inflammation.

The Astros recalled Alexander from Triple-A Sugar Land on Monday.

Alexander has been battered for 10 runs over 6.1 innings across his two relief outings in the majors this season. The righty will provide some length in the bullpen.

Scherzer (forearm/thumb/ankle) threw a 20-pitch bullpen session Monday, Jorge Castillo of ESPN.com reports.

Scherzer is working his way back from ankle, forearm and thumb issues and required cortisone injections to combat each of the latter two injuries. He will continue ramping up his throwing as his body allows, but a timeline for his return won't be available until he gets farther along. Scherzer has been sidelined since late April.

Manager Aaron Boone said Monday that the Yankees are discussing the possibility of activating Cole (elbow) from the 15-day injured list and having him make his season debut this weekend against the Rays, Chris Kirschner of The Athletic reports.

The Yankees had previously planned for Cole to make one more rehab start this week, but that was before the right-hander struck out six over 5.1 innings of one-run ball in his latest rehab outing with Triple-A Scranton/Wilkes-Barre on Sunday. Elmer Rodriguez -- who had been filling the final slot in the Yankees rotation -- was optioned to Triple-A Scranton/Wilkes-Barre earlier Monday, seemingly clearing the path for Cole's season debut, which would likely fall on Friday. Cole got his pitch count up to 86 on Sunday, so he's sufficiently stretched out. He's coming back from Tommy John surgery with an internal brace that he underwent in March 2025.

Snelling (elbow) will be examined by Dr. Keith Meister in Texas on Thursday, Christina De Nicola of MLB.com reports.

Snelling was placed on the 15-day injured list last Wednesday with a left elbow UCL sprain, but he'll be examined further before a decision is made regarding surgery. Even if Snelling opts for rest and rehab instead of an operation, he is likely looking at a lengthy absence.