Contreras went 2-for-5 with a two-run home run in Monday's loss to Atlanta.

Contreras tried to bring St. Louis back with a two-run shot off Raisel Iglesias in the ninth inning that brought his team within a run, but the comeback attempt ultimately fell short. The long ball was only the second of 2025 for Contreras, who belted 15 homers in just 358 plate appearances last season. The catcher-turned-first-baseman is slashing a paltry .182/.234/.295 on the campaign, but he's been bringing that mark up of late, going 6-for-16 over his past four games.

The Athletics could elect to wait until Wednesday to promote Kurtz to the major-league roster with the team set to face a left-handed pitcher Tuesday against the Rangers, Martin Gallegos of MLB.com reports.

News broke Monday afternoon that Kurtz's promotion was imminent, but Gallegos later reported that the 22-year-old may need to wait until Wednesday to make his big-league debut. The Athletics will presumably have more information to share on Kurtz's call-up closer to first pitch Tuesday.

Schmitt has been diagnosed with a Grade 2 oblique strain and is expected to miss one month, Alex Pavlovic of NBC Sports Bay Area reports.

Schmitt was officially placed on the 10-day injured list Saturday, though the extent of the injury wasn't truly known until Monday when he underwent an MRI. This news confirms that he'll miss more than the 10-day minimum and is looking at a potential return in mid-to-late May.

Walker is not in the lineup for Monday's game against the Blue Jays.

Walker hit his second home run of the season this past weekend against the Padres, but he's just 3-for-26 across his last eight contests and is slashing only .156/.253/.260 on the season. Zach Dezenzo is at first base and hitting ninth for the Astros.

The Athletics are set to promote Kurtz from Triple-A Las Vegas prior to Tuesday's game against the Rangers, Martin Gallegos of MLB.com reports.

The No. 4 overall pick in the 2024 First-Year Player Draft, Kurtz has slashed a robust .321/.385/.655 with seven home runs with Las Vegas this season and will make his major-league debut after racing through the minors. Kurtz is likely to split time between designated hitter and first base with Tyler Soderstrom, resulting in Brent Rooker seeing more starts in left field.

Arraez (concussion) is expected to be placed on the 7-day injured list, Kevin Acee of The San Diego Union-Tribune reports.

Arraez is dealing with concussion symptoms following his collision with Mauricio Dubon on Sunday. Arraez was stretchered off the field and taken to the hospital for further evaluation. He's since posted on social media that everything checked out fine, but the Padres are going to play it safe with their first baseman and let him rest this week. Connor Joe, Yuli Gurriel and Gavin Sheets will be candidates for increased playing time.

Vaughn is absent from the lineup for Monday's game in Boston.

It's a day off for Vaughn, who had started every game since April 4. Nick Maton is covering first base and batting leadoff for the White Sox, while Andrew Benintendi is getting at start at designated hitter.

Horwitz (wrist) has been cleared for baseball activity and will participate in extended spring training, MLB.com reports.

This marks a significant step in Horwitz's recovery, though he'll still likely need plenty of ramp-up time after missing all of spring training. He should take over as Pittsburgh's primary first baseman once activated from the injured list.

Valdez (shoulder) went 0-for-2 with a walk and a run scored Sunday against the Guardians.

Valdez was out of the starting lineup after suffering a minor shoulder injury Saturday, though he managed to enter the game as a pinch hitter in the sixth inning. That suggests Valdez should avoid a stint on the injured list, but his status will likely remain unclear until the Pirates retake the field Tuesday.

Lowe combined to go 4-for-7 with an RBI and a walk during Sunday's doubleheader against the Rockies.

Lowe went 1-for-3 with a walk during the Game 1 victory and followed that up with a 3-for-4 performance during a loss in the second game. He's collected multiple hits in three of his last six games after going 5-for-29 (.172) over his previous nine appearances. Lowe is now slashing .295/.375/.474 with 17 RBI through 22 games.