BOSTON — The White Sox got a glimpse of their future Saturday. And while the result didn’t go their way, they saw signs of hope. Infielder Chase Meidroth and catcher Edgar Quero combined for five of the Sox’ seven hits in their 4-3, 10-inning loss to the Red Sox. It was their sixth consecutive defeat. But the rookies’ performance in a tight game before a sellout crowd at Fenway Park was encouraging for the future. ‘‘We need that injection offensively, which is nice,’’ manager Will Venable said. ‘‘But just seeing these guys as young guys come into this environment and look like they belong and perform well means a lot.’’ With the Sox trailing 3-0 in the seventh inning, pinch hitter Joshua Palacios walked and later advanced to third on an error by shortstop Trevor Story. With two outs, Meidroth drove in Palacios with a single up the middle for his first career RBI and came around to score on Luis Robert Jr.’s tying home run. Venable said it was good to see Robert have a positive result after a subpar start to the season. It was Robert’s 10th career tying or go-ahead homer in the seventh inning or later. The rally came after former Sox left-hander Garrett Crochet shut down his old team for the second time in six days. After taking a no-hitter into the eighth inning against the Sox last Sunday at Rate Field, he yielded four hits, walked two and struck out seven in six scoreless innings against them Saturday. Quero put the Sox in position to take the lead in the ninth, doubling against Aroldis Chapman to begin the inning. But the veteran lefty got Palacios to pop out, struck out Brooks Baldwin and induced a flyout by Meidroth. The game also marked another step forward for rookie right-hander Shane Smith, who made his first major-league start in his home state of Massachusetts. Despite some command issues that led to three hit batters, he pitched four scoreless innings before allowing a double to Ceddanne Rafaela, a single to Jarren Duran and a three-run homer to Rafael Devers in the fifth. The Red Sox have a potent lineup. Entering the game, they had scored the seventh-most runs in the majors (96). Regardless, Smith knows that for as good as his first four starts have been — he has a 2.82 ERA in 22⅓ innings — he can improve. ‘‘Execution with two strikes,’’ Smith said. ‘‘Offspeed execution in early counts and staying aggressive and making sure my sequences are good.’’ In the 10th, Red Sox first baseman Triston Casas came to the plate with the bases loaded. After not chasing Mike Vasil’s first-pitch changeup, Casas pounced on the second offering near the heart of the zone for the winning single. It was the Sox’ third walk-off loss of the season. ‘‘We’ve got to strap it on tomorrow and get after it again,’’ Venable said of the Sox dealing with close losses. ‘‘I hope these guys look at a game like this, and we look at some of the things we could have done better, but we look at the things we did well, too.’’ The result wasn’t what the Sox wanted, but there were notable steps forward for them to point to. ‘‘Every opportunity we have on the field is an opportunity to analyze and get better,’’ Venable said. ‘‘At the same time, this gives them confidence that they can come in here and play with these guys. Good game. Sucks to lose.’’