SEATTLE -- Pinch-hitter Guillermo Heredia drove home Jarrod Dyson with a walk-off single with two outs in the bottom of the ninth as the Mariners topped the White Sox, 5-4, in Thursday's series opener at Safeco Field.
The speedy Dyson gave Heredia a chance by avoiding what looked like an inning-ending double play on a grounder to third by Carlos Ruiz with one out. Dyson beat the throw to second, with Ruiz still thrown out at first for the second out. Reliever Dan Jennings then intentionally walked Jean Segura before Heredia singled to right for the win.
"Huge," manager Scott Servais said of Dyson's baserunning. "That was close, too. Their guy Jennings is really quick to home plate. He's hard to steal off of. Dyson was trying to time him, didn't really have a chance to steal a base, but 3-2, you have to go and try and stay out of a double play. Anyone else is probably doubled up."

The White Sox had overcome a four-run deficit to tie the game, but wound up suffering their seventh straight road loss in falling to 17-22. Seattle improved to 13-6 at home and 20-22 overall.
"They're tough losses, but hopefully they're things we're going to continue to get over," White Sox manager Rick Renteria said. "The guys battled back to put us in a position to potentially come out on top."
Dyson hit a solo homer in the third -- just the ninth long ball of his eight-year career, though his second in his past four games -- and Segura gave Seattle a 4-0 lead with a three-run shot in the fifth off White Sox starter Dylan Covey.
Designated hitter Matt Davidson cut the lead in half with a two-run homer off reliever Casey Lawrence in the seventh and Todd Frazier and Tim Anderson went deep off Dan Altavilla in the eighth to tie the game at 4.
Rookie right-hander Sam Gaviglio threw five scoreless innings with three hits and a walk while striking out two, but took a no-decision in his first Major League start for Seattle.
• Gaviglio solid in first start

Covey (0-3, 7.64 ERA) remains winless in seven Major League starts as he allowed five hits and four runs over six frames for the White Sox.
"I was able to get some early outs and keep the pitch count down," Covey said. "I kind of got away from my fastball a bit, I think, in the middle innings and the off-speed kind of lost some sharpness."

MOMENTS THAT MATTERED
Segura keeps smacking: The Mariners shortstop extended his MLB-leading hit streak to 17 games in dramatic fashion, ripping a 1-0 slider over the out-of-town scoreboard in left field for a three-run homer off Covey to give Seattle a 4-0 lead in the fifth. Segura has been a huge catalyst for the Mariners in the leadoff spot, leading the AL with a .359 average. Segura's fourth homer of the season traveled 402 feet, per Statcast™, and was set up by a two-out rally when Covey gave up a single to Dyson and walked Ruiz, who was hitting .125.
"I went down and got it," Segura said. "I wasn't trying to hit a homer. I just saw the pitch and recognized it pretty good. I put a good swing on it and luckily it went out."

Back-to-back: The White Sox tied the game at 4 with homers by Frazier and Anderson off Altavilla in the eighth. Frazier's bolt to left field was his sixth hit at Safeco Field and four of those have been home runs. Anderson followed with a shot to right field for his fourth homer of the season as he capped a 3-for-4 night that included a double in the seventh. It was the third time the White Sox have gone back-to-back this year.
"I'm finally getting within myself and understanding my zone a little bit," Frazier said. "It has been taking a little longer than I expected, but I'm going to stay on that even keel, and hopefully I can keep going uphill. Seattle has a lot of hills here, so hopefully I'm going to stay uphill." More >>

QUOTABLE
"He's an interesting player. Every night you learn more and more about him. I thought the play he made, the backhand play in the hole and almost threw out [Avasail] Garcia was as good of a play I've seen all year, [on] a guy that can really run down the line. Obviously the big home run, hit a ball up in the zone and didn't miss it. It's hits, it's home runs, it's stolen bases, it's defense, it's kind of all over the field. It's something a little bit different every night." -- Mariners manager Scott Servais on Segura 

WHAT'S NEXT
White Sox: Staff ace Jose Quintana (2-5, 4.38 ERA) will take the hill for Chicago in Friday night's game at 9:10 CT. Quintana's 2.37 run-support average is the third-lowest in the American League. He got a no-decision in his last start on May 14 vs. San Diego after allowing three runs in seven innings..
Mariners:Ariel Miranda (3-2, 4.79 ERA) starts Friday's 7:10 p.m. PT game at Safeco. The 28-year-old lefty struck out a season-high eight in his last outing in Toronto, allowing three hits and one run in five-plus frames.
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