Troy Renck of the Denver Post reports that "there is concern" that Rafael Betancourt tore his elbow ligament during an appearance Thursday.
Luis Valbuena (hamstring) will begin a rehab assignment with High-A Inland Empire on Monday.
Mariners recalled 1B Daniel Vogelbach from Triple-A Tacoma.
Mariners designated OF Leonys Martin for assignment.
X-rays on Denard Span's right shoulder came back negative.
Salvador Perez (neck) remained out of the Royals' lineup Sunday.
Tigers manager Brad Ausmus said Sunday that J.D. Martinez (foot) is on track to be activated from the disabled list in late April or early May.
David Price (elbow) will throw a 45-50 pitch bullpen session on Monday.
Dustin Pedroia will undergo an MRI on his left knee and ankle on Monday in Boston.
George Springer (hamstring) might only miss one game.
Dexter Fowler (heel) is back in the Cardinals' lineup Sunday.
Ben Zobrist (back) is back in the Cubs' lineup Sunday.