PHOENIX (AP) — Luis Castillo threw six sharp innings, J.P. Crawford connected for a solo homer and the Seattle Mariners beat the Arizona Diamondbacks 4-0. The Mariners took two of three games in the weekend series, improving to 54-51 for the season as the team’s front office tries to decide whether to be buyers, sellers, or do nothing as Tuesday’s trade deadline approaches. The Diamondbacks are close to wrapping up a miserable July, with a 7-16 record so far in the month. Castillo gave up just two hits, striking out seven and walking one while throwing 102 pitches.