SEATTLE -- Welington Castillo homered twice off Seattle ace Felix Hernandez, including a two-run shot in the first inning, and the Arizona Diamondbacks won their fifth straight beating the Mariners 8-2 on Wednesday.
Arizona completed its first sweep of Seattle and fifth this season thanks to Castillo's two long balls. Castillo hit a two-run homer off Hernandez (12-6) as part of Arizona's four-run first inning, then added a solo shot leading off the fourth inning. He became just the sixth player to homer twice in the same game off Hernandez.
Castillo, who was on Seattle's roster briefly earlier in the season before being traded to Arizona, homered three times in the series.
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Patrick Corbin (2-3) allowed just one run and three hits in six innings, winning for the first time since his season debut on July 4 as he continues to come back from Tommy John surgery.
Paul Goldschmidt added a two-run single and David Peralta added a two-run triple as the Diamondbacks won for the seventh time in 10 games.
Arizona was aggressive against Hernandez early in the count and it paid off in the first inning with Ender Inciarte leading off with a single and A.J. Pollock following with a double. Goldschmidt added a two-run single before the first of Castillo's home runs. It was just the sixth time in 324 career starts Hernandez allowed four or more runs in the first inning, including giving up eight runs in the first to Houston earlier this season.
Arizona finished with 12 hits off Hernandez, a season-high allowed and most since 2013 against the Angels. Peralta capped the Diamondbacks big day with a two-run triple in the seventh on a deep fly ball to right-center field that likely should have been caught.
The seven earned runs were the most allowed by Hernandez since giving up eight runs and failing to make it out of the first inning against Houston on June 12. In the seven starts since that game in Houston, Hernandez had allowed eight earned runs total.
Corbin struck out six and rolled through Seattle's lineup. Brad Miller's two-out RBI single in the fourth was the only damage against the left-hander, who needed just 80 pitches to get through six innings.
Diamondbacks: Right-handed reliever Randall Delgado was placed on the 15-day disabled list with a sprained right ankle. Delgado was hurt working out before Tuesday's game. Addison Reed was recalled from Triple-A Reno and pitched two innings in relief of Corbin, allowing one run.
Mariners: Robinson Cano was out with an abdominal strain the club hopes will not linger more than a few days. Cano was injured making a play in the field in Monday's game against Arizona and played through the discomfort on Tuesday. Cano was scheduled to undergo an MRI before traveling with the team to Minnesota.
Diamondbacks: Arizona continues interleague play with three games at Houston. Rubby De La Rosa (8-5) gets the start in the opener. He's given up just one earned run in his last 15 innings.
Mariners: Seattle opens a key four-game series with wild card leading Minnesota on Thursday. J.A. Happ (4-5), who lasted just 1-2/3 innings in his last start, takes the mound for the Mariners.