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Jon Heasley RP | TB
Rays' Jonathan Heasley: Shuttled to 60-day IL
The Rays transferred Heasley (elbow) from the 15-day injured list to the 60-day IL on Monday.
Initially deactivated last Tuesday after being diagnosed with a right elbow stress reaction, Heasley still remains without a clear timeline for a return, but his move to the 60-day IL ensures he'll be shelved through at least July 27. In a corresponding 40-man roster move, the Rays selected outfielder Austin Slater's contract from Triple-A Durham.
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Austin Slater RF | TB
Rays' Austin Slater: Officially added to roster
The Rays selected Slater's contract from Triple-A Durham on Monday.
The Rays are scheduled to face all lefty starting pitchers during their three-game set versus the Red Sox, so the right-handed-hitting Slater should be busy. He's sporting an underwhelming .209/.286/.233 batting line through 49 plate appearances in the majors this season.
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Joe Musgrove SP | SD
Padres' Joe Musgrove: Resumes playing catch
Musgrove (elbow) started playing catch in late May, per MLB.com.
After making one appearance during spring training in early March, Musgrove experienced inflammation in his surgically repaired right elbow. He continued to play catch but was then shut down from even that amount of throwing. Musgrove has since been cleared to resume light throwing, but he doesn't appear to be anywhere near game action. He isn't expected to be ready to join the Padres until after the All-Star break.
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Trey Gibson SP | BAL
Orioles' Trey Gibson: Called up, drawing start Monday
The Orioles recalled Gibson from Triple-A Norfolk and will have him start Monday's game against the Mariners at Camden Yards.
The 24-year-old righty will be entering the Baltimore rotation as a replacement for right-hander Chris Bassitt (back), who was moved to the 15-day injured list in a corresponding move. Gibson is up with the Orioles for his fourth stint of the season, after previously turning in a 3.65 ERA, 1.62 WHIP and 5:7 K:BB in 12.1 innings over his first three big-league appearances (two starts).
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Chris Bassitt SP | BAL
Orioles' Chris Bassitt: Shelved with back discomfort
The Orioles placed Bassitt on the 15-day injured list Monday due to low back discomfort.
Bassitt was lifted early from his last start Wednesday in Boston due to a tight back, but after briefly returning to Baltimore to get examined, he rejoined the Orioles over the weekend for their road series in Toronto. Though the righty appeared to be trending toward taking the hill for his next turn in the rotation Monday versus the Mariners, the Orioles instead have opted to place him on the IL to give him more time to move past the back issue. Trey Gibson was called up from Triple-A Norfolk and will draw the start Monday in place of Bassitt, who will be eligible to return from the IL beginning June 20. Per Matt Weyrich of The Baltimore Sun, manager Craig Albernaz said Bassitt is still "looking at his options" for a treatment plan for the injury and is scheduled to receive a second opinion later this week.
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Eduarniel Nunez RP | CHC
Cubs' Eduarniel Nunez: Claimed off waivers by Cubs
The Cubs claimed Nunez off waivers from the Orioles on Monday.
Nunez will join his third organization in less than a month and his fourth since last year's trade deadline. The hard-throwing reliever has spent all of the 2026 campaign in the minors, collecting a 7.13 ERA and 21:19 K:BB across 17.2 frames. Nunez has been assigned to the Cubs' rookie-level Arizona Complex League affiliate, where he will go through the organization's pitching lab before eventually being assigned to a full-season affiliate, likely Triple-A Iowa.
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German Marquez SP | SD
Padres' German Marquez: Looking good during rehab stint
Marquez (forearm) tossed four scoreless innings in a rehab start for Triple-A El Paso on Sunday, allowing one hit and issuing one walk while striking out two batters.
Sunday marked Marquez's second rehab appearance after landing on the injured list May 3 due to right forearm nerve irritation. The veteran righty has tossed 6.1 scoreless frames and has allowed just two hits while posting a 5:1 K:BB across the pair of minor-league outings. Marquez threw 47 pitches Sunday, sitting at 95.4 mph with his fastball Sunday after averaging 94.2 mph on the pitch before getting hurt. Marquez seems likely to need another rehab outing or two before being activated from the IL, but he could be back with San Diego by the end of June.
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Jose Fermin LF | STL
Cardinals' Jose Fermin: Claims second straight start
Fermin went 1-for-4 with a run scored in Sunday's 5-3 victory over the Reds.
After going 3-for-4 with a stolen base and two runs while starting at third base in Saturday's 6-5 win, Fermin remained on the left side of the diamond for the series finale, this time filling in at shortstop for a resting Masyn Winn. Fermin is now slashing an acceptable .250/.312/.381 over 93 plate appearances on the season, but it's difficult to envision him moving out of a utility role unless St. Louis is hit hard by injuries in the infield or outfield.
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Matt Shaw RF | CHC
Cubs' Matt Shaw: Returning from IL on Tuesday
The Cubs will activate Shaw (back) from the 10-day injured list prior to Tuesday's contest in Colorado, Jesse Rogers of ESPN.com reports.
Shaw was sent to the IL a little over two weeks ago with mid-back tightness, but he's ready to rejoin the big club after going 4-for-14 with a 2:2 BB:K over four rehab games with Triple-A Iowa. With Dansby Swanson's ongoing struggles, Shaw could see more playing time than he had been getting before his injury. However, Shaw hasn't exactly pushed for a bigger role himself this season, slashing .242/.291/.400 across 42 games.