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

The Seattle Mariners took advantage of a down day for the rest of the American League contenders with a 3-1 win against the Athletics on Monday at Sutter Health Park. The Mariners improved to 57-50 with the victory,

Naylor, who was acquired via trade from Arizona last Thursday, hit a solo shot off Athletics starter JP Sears (7-9) to open the scoring in the second inning. The 30-year-old first baseman singled to lead off the fourth, stole second base and advanced to third on a throwing error before Mitch Garver’s sacrifice fly gave the Mariners a 2-0 lead.