Luis Castillo ran his streak of unbeaten starts to 12, Jarred Kelenic drove in two runs with a pair of singles and the visiting Seattle Mariners moved a game closer to the top of the American League West with a 7-2 triumph over the Oakland Athletics on Tuesday night.

J.P. Crawford and Teoscar Hernandez contributed RBI doubles to a four-run seventh inning, helping the Mariners (83-68) pull away for a win that lifted them within a half-game of the first-place Houston Astros (84-68) in the AL West. The Texas Rangers (83-68) are tied with Seattle for second.

Castillo (14-7) worked seven innings, allowing two runs and five hits. He walked three and fanned eight, recording his 200th strikeout of the season in the process.

The second-year Mariner carried a three-hitter and a 6-0 lead into the last of the seventh before Oakland scored twice on a double by Aledmys Diaz, a triple by Shea Langeliers and a sacrifice fly by Tyler Soderstrom.

Kelenic produced RBI singles in the second and fourth innings. Eugenio Suarez, who doubled in the second, and Hernandez, who walked and stole second in the fourth, scored the runs.

In beating Oakland for the 11th time in 12 meetings this season, the Mariners broke the game open in the seventh against the Athletics' bullpen, scoring all four runs with two outs.

An RBI single by Cal Raleigh and wild pitch by Easton Lucas plated the runs not produced by the doubles by Crawford and Hernandez.

A's starter Paul Blackburn (4-6) kept Oakland (46-105) in the game for five innings, limiting the Mariners to two runs and four hits. He walked one and struck out four.

Crawford capped a two-hit, two-run, two-RBI performance with a solo home run, his 16th homer of the season, leading off the ninth to complete the scoring.

Hernandez joined Kelenic and Crawford with two hits for the Mariners, who outhit the A's 11-6.

Zack Gelof had a double and a single for Oakland, which dropped its fifth straight game to open a 10-game homestand. The A's have lost six in a row overall.

--Field Level Media