BOSTON — In a season full of heartbreaking losses, momentum-stalling defeats and frustrating failures, the Boston Red Sox might just be starting to turn a corner.In their 82nd game, they finally won four games in a row for the first time this season, doing so in dramatic fashion with a walk-off 5-4 victory in 10 innings Sunday to complete a four-game sweep of the New York Yankees. Perhaps the second half will offer a rebirth on what’s been a tumultuous year so far.“There’s a long way to go,” interim manager Chad Tracy said. “We talked to the guys, just said we still got a lot of work to do, but we have some momentum now, and maybe the best momentum we’ve had. We got to just try to keep riding it for as long as we can. We’re playing really good baseball.”It was a game the Red Sox surely would have lost earlier in the year. They watched Sonny Gray’s no-hit bid broken up in the eighth inning, then flailed as a 2-0 lead slipped away in the ninth with closer Aroldis Chapman on the mound. A brutal play from Gold Glove-winning right fielder Wilyer Abreu contributed to the tie. The Yankees took a 4-2 lead in the 10th on another Abreu miscue, and, given the way the Red Sox have collapsed time and again this year, it seemed as if their fate was already sealed.But this time it wasn’t.Why MLB's draft proposal would be bad for baseball's futureKeith LawPinch hitter Masataka Yoshida tied the score on an RBI double before Jarren Duran, also entering as a pinch hitter despite a 2-for-27 stretch at the plate, smacked a single to right as the Fenway Park crowd erupted in euphoria and relief.“I’m sure a bunch of people counted us out as soon as we gave up two runs, I’m sure people left,” Duran said. “I’m sure people gave up on us, but nobody in this clubhouse gave up, and we’ve shown it this whole series. I feel like we’ve fought really hard this entire series, and it showed in the last game, and I’m just really proud of this team.”It all started with Gray.The 36-year-old was brilliant in the longest no-hit bid of his 14-year career.It took until his 97th pitch of the game for him to surrender a hit.Amed Rosario, who was the only previous batter to reach base against Gray on a fifth-inning walk, slapped a single up the middle to break Gray’s rhythm.“I solely was just so focused on executing every pitch that I threw,” Gray said. “It sounds super cliche and whatever, but I was solely just, ‘Execute this pitch, now execute this pitch, now execute this pitch,’ throughout the whole time, honestly.”Gray mowed through the Yankees’ lineup with efficiency, needing just 47 pitches through his first four innings.