What happened: The Mariners are open to trading right-handers Luis Castillo and Emerson Hancock ahead of the deadline, according to Ken Rosenthal and Will Sammon of The Athletic. The report lands the same week Seattle parted ways with assistant hitting coach Bobby Magallanes.

Why it matters: A Castillo trade would gut the top of Seattle's rotation, while dealing the same Hancock who started Wednesday's series opener would thin the Mariners' depth further. Elsewhere at the deadline, Tigers ace Tarik Skubal has said he wants to stay in Detroit even as rumors swirl around him.

What to watch: Seattle plays this afternoon in Arlington as the deadline decisions on Castillo and Hancock take shape.