Whitlock (1-0) allowed one run on three hits over five innings Sunday, striking out eight and earning a win over the Mariners.

The one run and three hits against Whitlock all came in the second inning, but he was nearly perfect otherwise. The 27-year-old righty looked terrific this spring and carried that momentum into his first appearance of the regular season. Whitlock's innings totals over the past three seasons have all been in the 70s, but he's in line for a full run in Boston's rotation in 2024.

Estevez picked up the save Sunday against the Orioles. He pitched a clean inning with no strikeouts.

Estevez calmly retired all three Orioles batters he faced Sunday to earn his first save of the season and 57th of his career. The 31-year-old reliever entered 2024 on the hot seat following the Angels' signing of Robert Stephenson over the winter. However, with Stephenson (shoulder) slated to be out until late April, Estevez should have no issue being the main saves target in the team's bullpen for now.

The Athletics designated Martinez for assignment on Sunday.

Martinez was reassigned from minor-league camp in early March and has now lost his place on Oakland's 40-man roster. The right-hander pitched in 22 games for the A's last season and posted a 4.75 ERA, 1.42 WHIP and 47:19 K:BB across 55 innings.

Astros GM Dana Brown said Sunday it'll likely be "a few more weeks" before the full scope of Sousa's shoulder injury is determined, Chandler Rome of The Athletic reports.

The left-hander landed on the injured list Thursday with shoulder inflammation, though the full specifics of the injury aren't yet known. Sousa doesn't have an official timeline for his return but will be sidelined well beyond the 15-day minimum.

Red Sox manager Alex Cora said Jansen (back) is still being evaluated ahead of Sunday's series finale against the Mariners, and the closer's availability has yet to be determined, Ian Browne of MLB.com reports.

Jansen was unavailable to pitch Saturday due to back tightness, and it remains unclear if he'll be ready to go Sunday. The Red Sox seem likely to be cautious with the 36-year-old early in the season, especially since he had limited reps during spring training due to lat and back issues. Should Jansen be unavailable, Chris Martin is the favorite to fill in should a save chance arise.

Sandlin (1-0) struck out two and hit one batter in a scoreless inning to earn the win Saturday over the Athletics. He did not walk a batter or allow a hit.

Tanner Bibee was inefficient with five walks in a four-inning start. Sandlin took care of the fifth inning and was credited for the win as the Guardians' bullpen pitched five hitless innings. Sandlin has four strikeouts over two innings this season, and he's yet to walk a batter or give up a hit. He's not in the high-leverage mix for 2024, but he had a 3.75 ERA and 1.03 WHIP with 10 holds over 61 appearances in 2023.

Quijada (elbow) is in Arizona to continue his throwing progression and could return by midseason, per MLB.com.

Quijada underwent Tommy John surgery last May, so he's now over 10 months into his recovery. The lefty hurler has been throwing from 60 feet as he takes incremental steps toward a return. If all goes well for Quijada, he could rejoin the Angels' bullpen around the beginning of July.

Perez landed on the 15-day IL on Sunday with a right oblique strain, Steve Melewski of MASNSports.com reports.

Perez was removed from Saturday's appearance against the Angels due to lower-back discomfort. After further evaluation, it was revealed he has an oblique strain. In a corresponding move, Baltimore recalled Jonathan Heasley from Triple-A.

Stephenson (shoulder) is lined up to throw a bullpen session in Miami on Monday, per MLB.com.

Stephenson threw off a mound Friday, using all of his pitches in a session that went well, per Rhett Bollinger of MLB.com. With the expectation that he'll throw again Monday, it appears that the veteran reliever is progressing well in his recovery from right shoulder inflammation. Stephenson has indicated that he hopes to join the major-league club by the end of April, and when he does so he should have a high-leverage role in the Angels' bullpen.

Heasley was recalled from Triple-A Norfolk on Sunday, Steve Melewski of MASNSports.com reports.

Heasley is getting recalled with Cionel Perez (oblique) landing on the 15-day injured list. The 27-year-old was optioned to minor-league camp after posting a 3.52 ERA and 4:2 K:BB over 7.2 innings in spring training. The righty last played in the majors for Kansas City last season, recording a 7.20 ERA in 15 innings.