Luis Castillo allowed a run in seven innings, Josh Naylor hit his first home run for the Mariners and Seattle beat the Athletics 3-1 on Monday night.

Luis Castillo allowed a run in seven innings, Josh Naylor hit his first home run for the Mariners and Seattle beat the ...

Luis Castillo pitched seven strong innings and Josh Naylor smacked his first homer with the Mariners to help Seattle post a 3-1 victory over the Athletics on Monday night in West Sacramento, Calif.

Josh Naylor hits his first homer as a Mariner as Seattle goes on for a 3-1 win over the Athletics.

Josh Naylor smashed his first home run since joining the Seattle Mariners, giving Seattle a crucial lift in their AL West ...

Josh Naylor's cousin is Athletics center fielder Denzel Clarke, and his younger brother plays for their Single-A affiliate ...

Preview the July 29 matchup between the Seattle Mariners and Athletics with odds over/under, game spread, betting lines and more.

Even after the acquisition of first baseman Josh Naylor last week, the Mariners plan to aggressively pursue more roster upgrades before the MLB trade deadline at 3 p.m. PT Thursday.

Mike Salk explains how the Seattle Mariners' trade for Josh Naylor puts them in better position to make additional moves before the trade deadline.

A so-so week in the National League West was highlighted by the Diamondbacks and Rockies getting a head start on the trade ...

On Thursday, the Seattle Mariners officially kicked off trade deadline season by acquiring former All-star first baseman Josh Naylor from the Arizona Diamondbac ...