Charlie Morton (elbow) had his right shoulder examined by Pirates doctors on Saturday.
Robbie Erlin needs Tommy John surgery.
Mariners placed RHP Tony Zych on the 15-day disabled list with rotator cuff tendinitis.
Joe Kelly (shoulder) is expected to make a rehab start Friday with Triple-A Pawtucket.
Ervin Santana (back) is on track to return from the disabled list Saturday versus the White Sox.
Avisail Garcia (hamstring) is aiming to return to the White Sox starting lineup Wednesday.
Mike Moustakas is absent from the Royals' lineup Tuesday because of a bruised thumb.
Ender Inciarte (hamstring) will begin a minor league rehab assignment Wednesday with Triple-A Gwinnett.
Jean Segura is out of the Diamondbacks' starting lineup on Tuesday due to a hip issue.
White Sox designated LHP John Danks for assignment.
Pablo Sandoval underwent season-ending surgery Tuesday to repair a torn labrum in his left shoulder.
Carlos Gomez (ribs) is back in the Astros' starting lineup on Tuesday night against the Twins.