MLB Player News

Horton (lat) was diagnosed with a subscapular strain Tuesday and will be shut down from throwing for 3-to-4 weeks, Tony Andracki of Marquee Sports Network reports.

The 22-year-old was removed from his May 29 start with the injury and was placed on Triple-A Iowa's 7-day injured list shortly thereafter. Horton will require some time to build up his arm strength after the shutdown period, so he likely won't be ready to rejoin Iowa until at least late July. He's struggled in his first taste of the Triple-A level this season with a 7.50 ERA and 1.56 WHIP through five starts.

The Padres selected Mazur's contract from Triple-A El Paso prior to his start Tuesday versus the Angels.

With Joe Musgrove (elbow) and Yu Darvish (groin) both on the IL, the Padres will call upon the 23-year-old Mazur to help fill the gaps in their rotation. He began the season in Double-A and was promoted to Triple-A in May after posting a 1.95 ERA and 0.87 WHIP. He hasn't found nearly the same amount of success through four starts with El Paso (7.11 ERA, 1.32 WHIP), so fantasy managers should temper their expectations as the right-hander makes his MLB debut Tuesday. Logan Gillaspie was optioned to Triple-A in a corresponding move.

Brewers manager Pat Murphy said Tuesday that Gasser (elbow) might miss some time but that the first MRI looked "pretty normal," Todd Rosiak of the Milwaukee Journal Sentinel reports.

The left-hander will receive a second opinion for the tightness and soreness in his elbow, but the initial imaging results are encouraging. Gasser still seems unlikely to avoid a stint on the injured list given it's an elbow issue, but the Brewers have yet to make an official roster move.

Suarez (hand) played catch without any apparent issues Tuesday, Matt Gelb of The Athletic reports.

He gave a thumbs-up to reporters afterward, and Phillies manager Rob Thomson was similarly upbeat about how Suarez checked out during Tuesday's workout. Suarez will throw a bullpen session Wednesday, and assuming that goes well, he's expected to be cleared to start against the Mets this weekend in London. The lefty departed his last outing Saturday versus the Cardinals after being struck on the pitching hand by a comebacker.

The Nationals recalled Herz from Triple-A Rochester on Tuesday, Bobby Blanco of MASNSports.com reports.

Herz is set to make his major-league debut Tuesday as he makes a start against the Mets in place of Trevor Williams (elbow), who was placed on the injured list. The left-hander has posted a 3.75 ERA and 42:29 K:BB over 36 innings covering nine starts for Rochester this season. Herz boasts a 33.6 percent strikeout rate during his time in the minors, but he's also generated an elevated 15.3 percent walk rate.

The Nationals placed Williams on the 15-day injured list Tuesday with a right flexor strain, Bobby Blanco of MASNSports.com reports.

Williams had been slated to start Tuesday's game against the Mets but now will be sidelined for at least two weeks, and quite likely longer. The veteran right-hander has been a pleasant surprise for the Nationals this season, collecting a 2.22 ERA in 11 starts. DJ Herz was called up from Triple-A Rochester and will start Tuesday in Williams' stead.

Rea is expected to pitch in bulk relief behind opening pitcher Jared Koenig in Tuesday's game against the Phillies in Philadelphia, Sophia Minnaert of Bally Sports Wisconsin reports.

Koenig is expected to receive his second opener assignment in as many days after he needed just five pitches to retire the Phillies' top three hitters in Monday's 3-1 win. Look for Koenig to work no more than an inning or two Tuesday before turning the game over to Rea, who previously worked behind Koenig on May 25 in Boston. The arrangement ended up working out well for Rea's fantasy managers, as he picked up the win against the Red Sox that day while allowing two runs and striking out two batters over 5.2 innings.

Peterson is scheduled to start Tuesday's game against the Nationals in Washington, Mark Zuckerman of MASNSports.com reports.

With a pair of off days Thursday and Friday ahead of their two-game series versus the Phillies in London this weekend, the Mets opted to condense their rotation from six to five men. Peterson ended up making the cut, as the Mets instead optioned rookie Christian Scott to Triple-A Syracuse last weekend. After returning from the 60-day injured list last week, Peterson drew a tough matchup in the Dodgers for his 2024 Mets debut, but he held his own against one of baseball's best offenses, giving up three runs (two earned) on seven hits and one walk while striking out three over five innings. He'll get a more favorable draw Tuesday, facing off against a Nationals offense that ranks 27th in the majors with an 81 wRC+ versus left-handed pitching for the season.

Major League Baseball announced Tuesday that Groome (undisclosed) has been suspended one year for violating the league's gambling policy, Jared Diamond of the Wall Street Journal reports.

MLB's investigation revealed that Groome made 24 bets on the Red Sox's major-league club while he was assigned to their High-A affiliate in Greenville. He didn't appear in any of the games on which he bet and MLB has determined that the outcomes of the games weren't compromised. Groome is currently on Triple-A El Paso's 7-day injured list due to an undisclosed issue.

Houser gave up two hits and two walks over 2.1 scoreless relief innings Monday to record his first hold of the season in Monday's win over the Nationals. He failed to strike out a batter.

It was far from a dominant performance, but Houser was able to protect an 8-5 lead after taking the ball from Tylor Megill to begin the sixth inning. Houser has adjusted well to a long-relief role so far, allowing two earned runs in 12.1 innings over five appearances, but his 5:7 K:BB suggests his luck won't last. Monday's hold was just the second of his career, with the other coming back in 2019 when he filled a similar swingman role with the Brewers.