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 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.

Williamson is such an interesting case depending on how you weigh his value. Defensively, he’s one of the elite third basemen in the league this year. Offensively, he entered Monday with a .596 OPS, ...